When you place the halves of the drawing made by you and a family member beside the mirror, you would observe the following:
1. Position the drawing halves side by side, with one half touching the mirror.
2. Look at the reflection of the half touching the mirror. You will see that it creates a complete image of the drawing in the mirror.
3. Compare the reflected image with the other half of the drawing made by your family member.
4. Notice any differences or similarities between the two halves of the drawing, as well as how the reflection in the mirror helps to complete the image.
By doing this activity, you can observe how mirrors create symmetrical reflections and explore the concept of symmetry in drawings and everyday objects.
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You are an organic being, and as such, you are part of the Carbon cycle. Describe your role as part of this cycle
As an organic being, I am part of the Carbon cycle. By taking in oxygen, I produce carbon dioxide, which is released into the atmosphere. Plants take in this carbon dioxide and convert it into energy through the process of photosynthesis.
This energy can then be used to produce oxygen, which I breathe in and exhale as carbon dioxide, completing the cycle. Not only do I produce carbon dioxide, but I also consume organic matter, such as plants. When I consume these organic materials, their carbon is released back into the atmosphere through respiration.
This cycle helps maintain the balance of carbon dioxide in the atmosphere and provides a continuous supply of energy to sustain life. As part of the Carbon cycle, I also help to regulate the global climate, as carbon dioxide is a potent greenhouse gas. Without the Carbon cycle, I would not be able to survive.
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Can air pollution cause localized deaths of a large number of people within just a few days? Explain
YES, Air pollution can indeed cause localized deaths of a large number of people within just a few days.
This is because air pollution contains a number of toxins, such as particulate matter, ozone, nitrogen dioxide, sulfur dioxide, and other hazardous air pollutants, which can cause direct and immediate health effects. These effects include respiratory and cardiovascular diseases, lung cancer, and other illnesses.
In addition, air pollution can also cause people to become more susceptible to other illnesses, such as influenza and other respiratory illnesses. Therefore, when a person is exposed to high levels of air pollution, their health can be severely compromised, leading to death in just a few days.
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do prokaryotic organisms have simple dna
Answer:
Most prokaryotes carry a small amount of genetic material in the form of a single molecule, or chromosome, of circular DNA
Explanation:
During muscle contractions , thin filaments are pulled towards the:.
During muscle contractions, thin filaments are pulled towards the center of the sarcomere by the myosin heads of the thick filaments. Muscle contraction occurs when the myosin heads attach to the actin binding sites on the thin filaments, forming cross-bridges.
The sliding filament theory explains how muscle contraction occurs. According to this theory, the sarcomere, which is the basic functional unit of a muscle, shortens during contraction because the thin filaments slide over the thick filaments.
The myosin heads attach to the actin binding sites on the thin filaments and pivot, pulling the thin filaments towards the center of the sarcomere. This process is powered by the hydrolysis of ATP molecules, which provides the energy for the myosin heads to move.
Overall, the movement of the thin filaments towards the center of the sarcomere during muscle contraction is a crucial aspect of the sliding filament theory, which provides a mechanistic explanation for how muscle contraction occurs at the molecular level.
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what was the hottest temperature ever recorded on earth134°F135°F136°F137°F
Answer:
Explanation:
The hottest temperature ever reliably recorded on Earth was 134°F (56.7°C) in Furnace Creek Ranch, Death Valley, California, on July 10, 1913. This measurement was taken by a meteorologist from the United States Weather Bureau using a standard mercury thermometer placed in the shade. While there have been reports of higher temperatures recorded in other locations, they have not been officially verified by reliable sources.
PLS MARK ME BRAINLIEST
Answer:
134°
Explanation:
Describe the role of dna helicase dna polymerase and dna ligase.
DNA helicase unwinds the double helix, DNA polymerase adds nucleotides to the new strand, and DNA ligase joins the Okazaki fragments together into a continuous strand.
DNA helicase is an enzyme that is responsible for unwinding the double helix structure of DNA during DNA replication.
It breaks the hydrogen bonds between the base pairs and separates the two strands of DNA, creating a replication fork.
DNA polymerase is an enzyme that adds nucleotides to the new strand of DNA during replication. It reads the template strand and matches the complementary nucleotide, adding it to the growing chain. It also proofreads and corrects any errors that may occur during replication.
DNA ligase is an enzyme that joins the Okazaki fragments (short segments of the lagging strand) together into a continuous strand.
It forms a phosphodiester bond between the adjacent nucleotides and seals the nicks that are left behind after DNA polymerase has finished adding nucleotides. It is also involved in DNA repair, joining together any breaks in the DNA backbone.
In summary, together, these enzymes ensure accurate and efficient DNA replication.
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in Drosophila, two mutations, Stubble(Sb) and curled(cu), are linked on chromosome lll. Stubble is a dominant gene that is lethal in a homozygous state, abd curled is a recessive gene.
female: Sb cu / + +
male: + cu / + cu
if the cross is made, and if Sb and cu are 8.2 map units apart on chromosome lll, and is 1000 offspring were recovered,
a) how many ofspring would have stubble bristles and curled wings?
b) how many offspring would have stubble bristles and normal wing?
c) how manu offspring would have curled wings and normal bristles?
a) Based on the information given, we know that the female parent carries the dominant Stubble allele (Sb) and the recessive curled allele (cu), while the male parent carries two copies of the curled allele (cu/cu). This means that all of the offspring will inherit one copy of the curled allele from their father, but only half of them will inherit the Stubble allele from their mother. Therefore, the expected proportion of offspring with both traits is: 1/2 x 1/2 = 1/4.
To calculate the actual number of offspring with both traits, we need to use the total number of offspring and the proportion we just calculated. So, if 1000 offspring were recovered, then 1/4 of them (or 1000 x 1/4 = 250) would have stubble bristles and curled wings.
b) For offspring with stubble bristles and normal wings, we know that they must inherit one copy of the Stubble allele from their mother, but not the curled allele from their father. This means that they must inherit the wild-type allele (+) from their father, which is present in both copies. Therefore, the expected proportion of offspring with stubble bristles and normal wings is: 1/2 x 1/2 = 1/4.
Using the same method as before, we can calculate the actual number of offspring with these traits as: 1000 x 1/4 = 250.
c) Finally, for offspring with curled wings and normal bristles, we know that they must inherit two copies of the recessive curled allele (cu/cu), but not the dominant Stubble allele from their mother. This means that they must inherit the wild-type allele (+) from their mother, which is present in both copies. Therefore, the expected proportion of offspring with curled wings and normal bristles is: 1/2 x 1/2 = 1/4.
Using the same method as before, we can calculate the actual number of offspring with these traits as: 1000 x 1/4 = 250.
To determine the expected number of offspring with specific phenotypes, we can use the recombination frequency (map units) and the total number of offspring.
a) Stubble bristles (Sb) and curled wings (cu):
Since Sb and cu are 8.2 map units apart, the recombination frequency is 8.2%. Since we have 1000 offspring, the expected number of offspring with this phenotype is 8.2% of 1000, which is 82 offspring.
b) Stubble bristles (Sb) and normal wings (+):
This phenotype results from non-recombinant gametes. The probability of non-recombination is 100% - 8.2% = 91.8%. Since we have 1000 offspring, the expected number of offspring with this phenotype is 91.8% of 1000, which is 918 offspring.
c) Curled wings (cu) and normal bristles (+):
This phenotype results from recombinant gametes, and the expected number of offspring with this phenotype is the same as in (a) since Sb is lethal in the homozygous state, and no offspring will have the recessive normal bristle allele in this case. Therefore, 82 offspring would have curled wings and normal bristles.
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(a) Describe the pattern of inheritance that is most likely associated with a mutation in the MT-ND5 gene.
The pattern of inheritance most likely associated with a mutation in the MT-ND5 gene is maternal inheritance. This is because the MT-ND5 gene is located within the mitochondrial DNA, and mitochondria are inherited exclusively from the mother.
The MT-ND5 gene is located in the mitochondrial DNA and codes for a subunit of Complex I of the mitochondrial respiratory chain. Mutations in this gene have been associated with a variety of mitochondrial diseases, including Leigh syndrome, which is a progressive neurodegenerative disorder.
Mitochondrial DNA is inherited maternally, meaning all offspring receive their mitochondrial DNA from their mother. This is because the egg cell contributes most of the cytoplasm to the developing embryo, thus most of the mitochondria. The sperm, on the other hand, typically only contributes its genetic material.
Therefore, if a mother has a mutation in her mitochondrial DNA, all her children will inherit the mutation. However, the severity of the disease caused by the mutation can vary widely, even among siblings with the same mutation.
The pattern of inheritance associated with a mutation in the MT-ND5 gene is, therefore, mitochondrial inheritance, or maternal inheritance.
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storm drains are connected by ____ to the outlet where the water goes into the river.
Answer:
Street gutters is the answer
Is there a person in the room with whom you share all of the same traits? How
can this be possible in the two of you are not related?
It is highly unlikely for any two individuals to share all the same traits, even if they are related. While two people may share some similar traits, it is unlikely for them to have all the same traits unless they are identical twins who share the same genetic code.
Is it possible that two persons share all of the same traits?It is extremely unlikely for two unrelated individuals to share all the same traits, including physical characteristics, personality, interests, and behaviors. Even identical twins, who share the same genetic code, may exhibit some differences in their traits due to environmental factors and experiences that can shape their development and personality.
The reason for this is that traits are influenced by a complex interplay of genetic and environmental factors. While genetics can play a role in determining certain traits, such as physical characteristics or predispositions to certain health conditions, environmental factors such as upbringing, culture, and experiences can also have a significant impact on a person's traits.
Therefore, it is highly unlikely for two individuals to share all the same traits, as even the slightest differences in their genetic makeup or life experiences can lead to differences in their traits.
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Oswald Avery heat-treated S cells and then split them into proteins, DNA, and RNA. He then repeated Griffith's experiment by mixing each part of the heat-treated S cells with living R cells. He found living S cells in the samples containing destroyed proteins and destroyed RNA, but he did not find living S cells in the samples containing destroyed
DNA. What idea did his findings support?
Seafood watch recommends which seafood _______. A. To buy or avoid b. To catch and sell c. To harvest sustainably d. Is safe to eat please select the best answer from the choices provided a b c d
A . to buy or avoid , Seafood Watch assesses how specific fisheries or farms perform against our rigorous environmental sustainability standards and then assigns ratings based on the outcomes. We suggest buying Best Choice, Good Alternative, or recommended certified seafood where possible or choosing a plant-based alternative.
What is formed when reverse transcriptase is used on a strand of mRNA
When reverse transcriptase is used on a strand of mRNA, a complementary DNA strand, known as cDNA, is formed.
Reverse transcriptase is an enzyme that can convert RNA into DNA. When it is used on a strand of mRNA, it produces a complementary DNA strand, known as cDNA. This process is called reverse transcription.
The resulting cDNA can then be used for various applications, such as cloning, gene expression analysis, and genome sequencing. It is a useful tool in molecular biology because it allows scientists to study the genetic information of an organism, even if the genomic DNA is not available.
Reverse transcriptase is commonly used in the study of viruses, particularly retroviruses, which have RNA genomes. By using reverse transcriptase to make cDNA from the viral RNA, scientists can study the viral genome and develop treatments or vaccines for viral infections.
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Which two taxa do you combine
to create the scientific name of an
organism?
Ex 2 p65 grade 6 pls help
Research and provide a description of the "talk test" and "breath test" as it relates to physical activity. Make reference to the anaerobic threshold in your answer. (10 marks: 3 definition, 2 reference to the anaerobic threshold) – you must describe the test and how it is conducted. A) What are the effects of the ‘talk test’ and ‘breath sound check’ on the body? (2 marks) b) How do the tests relate to intensity level? (2 marks) 2) Why is it important for an athlete to get rid of CO 2 than take in O 2 ? (2 marks) 3) Why do trained subjects have a lower VE (Minute Ventilation) during exercise? Explain. (2 marks) 4) What is the relationship between the lactate threshold and ventilatory threshold? (2 marks) 5) Describe what VO2 max is and how it differs between a trained and untrained individual. (4 marks) 6) What is a ‘Shallow Water Blackout’? Explain how it happens in terms O2 and CO2 levels (4 marks) ** References should be embedded in the write up**
Two techniques are used to gauge an individual's exercise intensity during physical activity: the "talk test" and the "breath test."
A self-paced way of gauging exercise intensity called the "talk test" involves having a conversation while exercising. This test is frequently employed as a benchmark for moderate-intensity exercise, which is typically understood as a tempo at which a person may converse while exercising. VO2 max is the maximum amount of oxygen an individual can utilize during intense exercise, and it is an indicator of cardiovascular fitness.
The "breath test" is a technique for calculating ventilation rate, which is a measurement of how much air a person breaths in and out per minute when exercising. In order to fulfil the increased metabolic demand during vigorous activity, the body generates more carbon dioxide [tex](CO_2)[/tex] and needs more oxygen[tex](O_2).[/tex] The link between ventilation rate and exercise intensity may thus be assessed using the breath test.
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If you sprinkle sugar on a bowl of strawberries, the juice comes out of them. Does this explain a hypotonic, hypertonic or isotonic solution? How does this compare to a red blood cell placed in pure water and a red blood cell placed within plasma? Explain your answer thoroughly and be sure to define the three osmotic terms within your answer
The addition of sugar to a bowl of strawberries does not explain a hypotonic, hypertonic or isotonic solution, as it does not involve osmosis.
Osmosis is the process by which water moves through a semipermeable membrane in order to reach equilibrium between two solutions of different concentrations. Hypotonic solutions are those with a lower concentration of solutes than the solution it is being compared to, while hypertonic solutions have a higher concentration of solutes.
Isotonic solutions have the same concentration of solutes on both sides of the membrane. When a red blood cell is placed in pure water, the cell will swell as the pure water is hypotonic to the cell, meaning it has a lower concentration of solutes than the inside of the cell.
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Short segments of newly synthesized DNA are joined into a continuous strand by ___ A. DNA polymeraseB. single-strand binding protein C. ligase D. helicase E. primase
Answer:
C. ligase
Explanation:
The "short segments" are Okazaki fragments which are connected by ligase to form the lagging strand.
Short segments of newly synthesized DNA are joined into a continuous strand by ligase. The co
DNA replication involves the synthesis of two new strands of DNA that are complementary to the original DNA strand. DNA polymerase is the primary enzyme that adds nucleotides to the growing DNA strand.
Helicase is responsible for unwinding the double helix structure of DNA. Primase is an enzyme that synthesizes a short RNA primer that is necessary for DNA polymerase to begin adding nucleotides.
Single-strand binding proteins stabilize the separated strands of DNA, preventing them from re-forming a double helix.
In the lagging strand of DNA replication, DNA polymerase synthesizes short fragments of DNA called Okazaki fragments, which are subsequently joined together by ligase.
Ligase is an enzyme that forms phosphodiester bonds between adjacent nucleotides in the sugar-phosphate backbone of DNA. This process results in the formation of a continuous strand of DNA.
Without ligase, the newly synthesized Okazaki fragments would remain unconnected, and the DNA strand would be fragmented.
Thus, ligase plays a crucial role in ensuring the integrity of the DNA molecule during replication.
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the countercurrent multiplier is a phenomenon that occurs in the nephron loop. countercurrent exchange occurs as both solutes and water move freely in and out of the vasa recta. the increase in osmolarity, as filtrate moves down the descending limb, is due to
The countercurrent multiplier is a phenomenon that occurs in the nephron loop. countercurrent exchange occurs as both solutes and water move freely in and out of the vasa recta. The increase in osmolarity, as filtrate moves down the descending limb, is due to water moving out of the tubule.
This is because the nephron loop is designed to create a concentration gradient, with a higher concentration of solutes in the renal medulla. The countercurrent multiplier uses the energy from the movement of ions, such as sodium and chloride, to create this gradient.
Meanwhile, countercurrent exchange allows for the exchange of solutes and water between the vasa recta and the nephron, which helps to maintain the concentration gradient and prevent the loss of too much water from the body.
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The probable question may be:
the countercurrent multiplier is a phenomenon that occurs in the nephron loop. countercurrent exchange occurs as both solutes and water move freely in and out of the vasa recta. the increase in osmolarity, as filtrate moves down the descending limb, is due to ____ moving out of the tubule
Hidaya and saburi
mother’s genotype:
father’s genotype:
offspring genotype %: offspring phenotype %:
Hidaya and Saburi’s genotype refers to the genetic makeup of the parents. Genotype is the set of genes that an individual carries for a particular trait. In the case of Hidaya and Saburi, their genotype would determine the traits that their offspring may inherit.
The offspring genotype percentage is the probability of the offspring inheriting a particular set of genes from their parents. This percentage is determined by the laws of inheritance and the parents’ genotype. The offspring phenotype percentage is the probability of the offspring expressing a particular physical trait based on their genotype.
For example, if Hidaya and Saburi both have the genotype of Aa, the offspring genotype percentage would be 25% AA, 50% Aa, and 25% aa. The offspring phenotype percentage would depend on the specific traits that the A and a alleles code for. In general, if the dominant allele (A) codes for a trait such as brown eyes, and the recessive allele (a) codes for blue eyes, then 75% of the offspring would have brown eyes, and 25% would have blue eyes.
It’s important to note that genetics is not always straightforward, and there may be variations and exceptions. However, understanding the basics of genotype and phenotype percentages can help predict the traits that offspring may inherit from their parents.
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complete question is:
Show the cross between Hidaya and Saburi:
Mother’s genotype: ____________ Father’s genotype: ____________ Genotype %: _________________ ____________________________ Phenotype %:________________
in the progression from smaller to larger components of the lymphatic pathway, the lymphatic join one of two collecting are what?
In the progression from smaller to larger components of the lymphatic pathway, the lymphatic vessels join one of two collecting ducts called the thoracic duct and the right lymphatic duct.
The lymphatic system is a network of vessels and tissues that work together to transport lymph, a clear fluid containing white blood cells, throughout the body. Lymphatic vessels range in size from tiny capillaries to larger vessels that resemble veins.
As lymphatic vessels converge, they join one of two larger collecting ducts: the thoracic duct or the right lymphatic duct. The thoracic duct is the larger of the two and drains lymph from the lower body and the left side of the head, neck, and chest into the left subclavian vein.
The right lymphatic duct is smaller and drains lymph from the right side of the head, neck, and chest into the right subclavian vein. These ducts return the lymph to the circulatory system, where it is eventually returned to the bloodstream.
Understanding the anatomy and function of the lymphatic system is important for understanding the body's immune response and for diagnosing and treating lymphatic disorders.
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Why would microfossils of bacteria and microscopic organisms would make good index fossils?
The abundance, rapid evolution, wide distribution, and unique characteristics of bacteria and microscopic organisms make them excellent index fossils for studying the geological history of the Earth.
Microscopic organisms and bacteriaA live being that is minuscule is one that cannot be seen with the ordinary eye. Microorganisms include, but are not limited to, bacteria, archaea, fungi, protists, and viruses.
Bacteria are prokaryotic, unicellular bacteria that inhabit practically all of Earth's habitats. They are distinguished by their relatively straightforward cellular architecture, lack of a real nucleus, and other membrane-bound organelles. Some types of bacteria can infect people, animals, and plants with diseases, and they play significant roles in the cycling of nutrients in ecosystems. Many bacteria, however, also have positive effects, such as those that aid in food digestion in the human stomach or those employed in biotechnology to create antibiotics, enzymes, and other valuable substances.
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Studying the differences between fossils and modern
organisms helps scientists better understand the-
•evolution of organisms over time
•primary function of key macromolecules
•role of mutation in life functions
•adaptation of organisms through acquired traits
Studying the differences between fossils and modern organisms helps scientists better understand the evolution of organisms over time. By comparing the physical characteristics and genetic makeup of ancient organisms with those of their modern-day counterparts, scientists can track changes in the structure and function of various body parts and systems, as well as in the distribution and frequency of certain traits and features. This can shed light on how different species have adapted to changing environmental conditions over millions of years, and how natural selection has driven the emergence of new traits and behaviors.
In addition to evolution, the study of fossils and modern organisms can also provide insights into the primary function of key macromolecules. These include proteins, nucleic acids, lipids, and carbohydrates, which play crucial roles in everything from energy production to cellular communication and DNA replication. By analyzing the chemical composition and structural properties of fossils and living organisms, scientists can better understand how these macromolecules have evolved and diversified over time, and how they contribute to the functioning of different biological systems.
Furthermore, the study of fossils and modern organisms can also help scientists better understand the role of mutation in life's functions. Mutations are changes in the genetic code that can lead to new traits or alterations in existing ones. By examining the frequency and distribution of mutations in ancient and modern organisms, scientists can gain insights into how mutations have contributed to the evolution of different species, as well as how they impact the functioning of different biological systems and processes.
Finally, the study of fossils and modern organisms can also provide insights into the adaptation of organisms through acquired traits. Acquired traits are those that are not inherited genetically, but instead are acquired through an organism's interactions with its environment. By studying how different species have adapted to different environmental conditions over time, scientists can better understand how these acquired traits have contributed to the survival and success of different organisms, as well as how they interact with inherited traits to shape the evolution of different species.
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A rib cage is present in the rat and pigeon but missing in the frog. Can this difference be related tothe fact that frogs breathe by positive pressure, while birds and mammals breathe by negative pressure? Explain
Yes, this difference be related to the fact that frogs breathe by positive pressure, while birds and mammals breathe by negative pressure.
The difference in the presence of a rib cage in the rat, pigeon, and frog can be related to how each animal breathes. Mammals, such as the rat, and birds, such as the pigeon, breathe by negative pressure, meaning that they draw air into their lungs by contracting their diaphragm and intercostal muscles.
This causes the rib cage to expand, which helps to create a vacuum effect and draw air into the lungs. In contrast, frogs breathe by positive pressure, meaning that they force air out of their lungs, which causes their rib cage to contract. Since frogs have no need for a rib cage to help draw air into their lungs, they have evolved to not have one.
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Use the drop-down menus below to complete the following statement. the system contains glands that secrete hormones into the bloodstream, whereas the system secretes substances through ducts.
The endocrine system contains glands that secrete hormones into the bloodstream, whereas the exocrine system secretes substances through ducts.
The endocrine system is responsible for producing and secreting hormones directly into the bloodstream to regulate various bodily functions, such as growth and development, metabolism, and reproduction.
These hormones act as chemical messengers and travel throughout the body to target cells or organs that have specific receptors for that hormone. The glands of the endocrine system include the pituitary gland, thyroid gland, adrenal gland, and pancreas, among others.
On the other hand, the exocrine system includes glands that secrete their products through ducts or tubes into a particular organ or onto a surface, such as the skin or digestive tract.
These secretions may include enzymes, mucus, or sweat, and serve various functions, such as aiding in digestion or protecting the skin from dehydration or infection.
Examples of exocrine glands include the salivary glands, sweat glands, and mammary glands.
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Answer: here's your answer
Explanation
✔ endocrine
endocrine✔
✔ endocrineexocrine pituitary gland✔
endocrine thyroid gland
endocrine✔ exocrine salivary glands
what causes less competition
A. different reproductive habits of species
B. greater day/night temperature differences
C. greater differences between niches
Answer:
c
Explanation:
C. greater differences between niches.
A greater difference between niches results in less direct competition for resources. When species occupy different niches, their roles in the environment do not overlap significantly, and they can coexist with less interspecific competition. In contrast, if species have similar niches, they are in direct competition with each other, leading to reduced population sizes and potential extinction.
Different reproductive habits of species and greater day/night temperature differences have no direct effect on competition.
Match the following terms and definitions.
1. an animal without a body cavity
ectoderm
2. development of an apparent head end of an animal
deuterostomes
3. flagellated cell lining the inside of a sponge
acoelomate
4. an animal with a fluid-filled body cavity that lies within the mesoderm
coelomate
5. organisms that form by radial cleavage and develop an anus from the first indentation of the gastrula stage of embryonic development; includes echinoderms, chordates, and vertebrates
choanocyte
6. "outer skin"; layer of cells that develop on the outside of the embryo
cephalization
1.) Acoelomate 2.) Cephalization 3.) Choanocyte 4.) Coelomate 5.) Deuterostomes 6.) Ectoderm
What is meant by ectoderm?Ectoderm is one of the primary germ layers that forms during embryonic development and gives rise to variety of structures, including skin, hair, nails, nervous system, and sensory organs.
Acoelomate - an animal without body cavity
Cephalization - development of apparent head end of an animal
Choanocyte - flagellated cell lining the inside of sponge
Coelomate - an animal with fluid-filled body cavity that lies within mesoderm
Deuterostomes -organisms that forms by the radial cleavage and develops anus from first indentation of gastrula stage of embryonic development; includes echinoderms, chordates, and vertebrates
Ectoderm - "outer skin"; layer of cells that develop on the outside of embryo
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pollution can be controlled by ___ the pollution at the power plant
Bill nye pollution solutions video PLEASE HELP!!!!!
Production of a neurotoxin that prevents acetylcholine release from motor neurons at neuromuscular junctions is a characteristic of:
Answer: The production of a neurotoxin that prevents acetylcholine release from motor neurons at neuromuscular junctions is a characteristic of some species of bacteria, particularly those in the genus Clostridium.
Explanation:
This neurotoxin, called botulinum toxin, causes the disease botulism and can result in muscle paralysis and respiratory failure if left untreated. Botulinum toxin is one of the most potent toxins known to science, and its use has been explored for both therapeutic and cosmetic purposes, such as in the treatment of muscle disorders and the reduction of wrinkles.
What happened to the sound wave when it encountered air of a different temperature?
(A) The sound wave changes speed and direction, bending away from the denser air and towards less dense air.
(B) The sound wave changes speed and direction, bending away from the less dense air and towards more dense air
(C) The sound wave changes direction but not speed, bending away from the less dense air and towards more dense air.
(D) The sound wave changes direction but not speed, bending away from the denser air and towards less dense air
When a sound wave encounters air of a different temperature, the correct answer is (A) The sound wave changes speed and direction, bending away from the denser air and towards less dense air.
A sound wave is a type of mechanical wave that is created by the vibration or disturbance of matter. It is characterized by the transfer of energy through compressions and rarefactions of the medium it travels through. Sound waves can propagate through various mediums, including air, water, and solids.
Changes in temperature can cause variations in air density. Sound waves travel at different speeds in the air with different densities. When a sound wave moves from an area of higher air density (cooler air) to an area of lower air density (warmer air), it slows down and changes direction, bending away from the denser air and towards the less dense air. This phenomenon is known as refraction.
Therefore, the correct answer is (A) The sound wave changes speed and direction, bending away from the denser air and towards less dense air.
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