Answer:
The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment.
Explanation:
hope this helps
What symbol is used to designate an absolute cell reference?.
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Hello there
Pepsin is a digestive enzyme that ________. is denatured and rendered inactive in solutions with low pH is manufactured by the pancreas begins the digestion of proteins in the stomach helps stabilize fat-water emulsions splits maltose into monosaccharides
Answer:
Pepsin is a digestive enzyme that serves to digest proteins found in indigested food.
Explanation:
Pepsin is the principal enzyme involved in proteins. It breaks down proteins in to smaller peptides and amino acids that can be easily absorbed in the smaller intestine.
Which of the following are ways that humans can pollute water?
there are four correct answers
A
Dumping oil down a drain
B
Using a water filter
C
Drinking out of the tap
D
A company dumping waste into a creek
E
Farmers using pesticides that then go into a river
F
Leaving garbage on the beach so that it gets pulled into the ocean
Human dna polymerase cannot be used in pcr. Why do you think this is the case?.
Human DNA polymerase cannot be used in polymerase chain reaction because it disables at a high temperature.
What is PCR?Polymerase chain reaction (PCR) is a biological technique in molecular biology used for creating multiple copies of DNA from a sample.
The principle behind PCR involves the use of high temperature. An enzyme called polymerase is used to catalyze the formation of polymers of DNA using an existing strand of DNA as a template.
However, TAQ polymerase is used because it tends to be stable at high temperatures unlike human DNA polymerase that disables when it reaches a high temperature.
Therefore, human DNA polymerase cannot be used in polymerase chain reaction because it disables at a high temperature.
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what is abc control disease method
Answer:
Active Bacterial Core surveillance (ABCs) is an active laboratory- and population-based surveillance system for invasive bacterial pathogens of public health importance.
Explanation:
Which diagnostic test associated with hearing loss notes a response of the stapedius muscle to the presence of loud sound
The diagnostic test associated with hearing loss notes as a response of the stapedius muscle is called the Acoustic reflex.
What is an Acoustic reflex?The term 'acoustic reflex' refers to the process of contraction of the stapedius muscle, which is located in the tympanic cavity.
The Acoustic reflex test can be used to determine the contraction of this muscle (stapedius muscle) by a loud sound.
In conclusion, the diagnostic test associated with hearing loss notes as a response of the stapedius muscle to the presence of loud sound is Acoustic reflex.
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Which statement about somatic mutations is true?
O A. They exist in all the cells of the body.
O B.
They are acquired through exposure to mutagens.
• C.
They are inherited via sperm and egg cells.
• D.
They are passed on to offspring.
Answer:
c. they are inherited via sperm and egg cell
What is chromatin?
A. a structure that allows materials in and out of the nucleus
B. a thread-like genetic material formed from DNA and histones
C. a defensive layer that forms when the cell is under attack
D. a structure that protects the nucleus from extreme temperatures
Answer:
B. a thread-like genetic material formed from DNA and histones
Help, I need answer for this, and I don’t understand
Answer:
Read the Explanation below.
Explanation:
They could first test the density of the skeleton to see if it is real or not (bone has a different density and weight than plastic). They could also measure a sample of one part of the skeleton and see if it contains skeletal tissue (if it does, it is a from a human being).
Which statement is true regarding the Yellowstone National Park?
OPTIONS
There are diverse habitats, from open meadows of wildflowers to thick pine forests.
The types of undergrowth in the forests are uniform and do not change.
Each spring, fires will destroy the forests and reduce them to white ash.
Forestry officials clear the forests regularly to provide new grazing ground for large herbivores.
d I think so
sorry if I'm wrong
The sustainable use of rainforest resources is exemplified by _______. a. lumber harvesting b. ranching c. harvesting nuts d. none of the above please select the best answer from the choices provided a b c d
Answer:
C
Explanation:
The sustainable use of rainforest resources is exemplified by
harvesting nuts.
Sustainable use of rainforest resources by harvesting nuts, provide a source for human resource, hence option c is correct.
What is the sustainable use of rainforest resources?To minimize deforestation, tropical rainforests can be maintained in the following ways: logging and replanting - selective logging of older trees guarantee that the rainforest canopy is protected.
Because the younger trees have more space and sunshine to develop, the forest can recover. The environment supports fruits such as nuts, papayas, mangos, cacao, and coffee beans.
Rainforests also contain several therapeutic items. In the United States according to the National Cancer Institute, 70% of plants beneficial in cancer therapy are only found in rainforests.
Therefore harvesting nuts for human resources is sustainable use of rainforest resources, hence option c is correct.
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Which biogeochemical cycle does not include a major path in which the substance cycles through the atmosphere?.
Answer:
phosphorus cycle.
Explanation:
Which organelles are found in an animal cell?
Check all that apply.
endoplasmic reticulum
centrioles
cell wall
vacuoles
lysosomes
mitochondria
chloroplasts
cell membrane
Answer:
1. Endoplasmic reticulum
2. Centrioles
3. Mitochondria
Answer:
A, B, D, E, F, H
Explanation:
Edge… you’re welcome
Definition of
(a)
Diploid.
(b)
Homologous.
Answer:
Diploid is a cell or organism that has paired chromosomes, one from each parent.
homologous is having the same relative position, value, or structure
Explanation:
Why does the line you're in always move the slowest?
Answer:
It is actually your thought
Explanation:
This is because you might be in an hurry so you think the line is moving very slow whereas it is not.
when someone jumpstarts a car, what do you think happens to the stored energy in the working battery?
What are cyclins, kinases, and telomeres? What do they do, and what are the differences between them? (Please explain, I’ll give brainliest!)
Answer:
Cyclins are the regulatory subunits of holoenzyme CDK complexes that control progression through cell-cycle checkpoints by phosphorylating and inactivating target substrates. Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks).
Kinases are a type of enzyme (a protein that speeds up chemical reactions in the body) that adds chemicals called phosphates to other molecules, such as sugars or proteins. This may cause other molecules in the cell to become either active or inactive. Kinases are a part of many cell processes.
Telomeres are DNA-protein structures that form protective caps at the end of eukaryotic chromosomes. They constitute the safeguards of chromosome degradation and are responsible for maintaining genomic integrity.
The key difference between cyclins and kinases is that cyclins are regulatory proteins that have no enzymatic function in the cell cycle, while kinases are catalytic proteins that have an enzymatic function in the cell cycle.
Hope this helps!! Im taking bio right now and its very hard
In the replication process of viruses, viruses use ______________ to attach to their host cells at molecules on the cell called viral receptors.
Answer:
Receptors
Explanation:
In the replication process of viruses, viruses use glycoprotein to attach to their host cells at molecules on the cell called viral receptors
What is replication of viruses?Replication of viruses refer to the process in which viruses multiply or replicate in a host cell thereby causing infection.
Therefore, In the replication process of viruses, viruses use glycoprotein to attach to their host cells at molecules on the cell called viral receptors.
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What area of development deals with learning and the ability to apply knowledge to new experiences?.
Answer:
Cognitive development
Explanation:
Which energy transformation occurs first in a coal-burning power plant?.
When coal is burned, chemical potential energy is transformed into thermal energy, light energy, and sound energy. Therefore only the thermal energy is used for their electricity production.
Hope this helps :))
why is Biology so hard?
Answer:
Imagine studying a cell. That cell has billions of things you can learn about. Now imagine 37.2 trillion cells each a little bit different but still similar. Now imagine that multiplied by all the different people there are on earth. Now then include all the other types of living animals.
That's biology
In eukaryotes, what allows only certain genes to be expressed in different types of cells?.
how does a snowy owl find its way back
Answer:
Dense camouflaged feathers (anatomical) - Snowy owls have white camouflaged feathers to help them blend into the white landscapes of the arctic. Their feathers extend thickly over all parts of the body unlike other owls which often have less on the face and legs in particular, the toe feathers of the snowy owl are more than twice as long as the next longest on an owl.
Explanation:
A missense mutation is if the new amino acid is chemically similar to the original one. If the new amino acid is chemically different, then the missense mutation is .
when it leads to the wrong amino acid being made
A missense mutation is conservative when a new amino acid is chemically similar to the original one and if different it is non-conservative.
What is missense mutation?A mutation in a gene's DNA sequence causes one amino acid, the building block of proteins to be replaced with an amino acid that isn't normally present at that location.
A missense variant is a sort of substitution in which a nucleotide change causes the protein produced by a gene to have a different amino acid in lieu of a different amino acid that was present in the original protein.
A variation in the amino acid might affect how well the protein works, missense mutations can modify the expression of the relevant protein by affecting DNA-transcription factors.
Therefore, a missense mutation is conservative and non-conservative depending upon new amino acid.
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The kidneys filter approximately 180 L of plasma per day, but only excrete about 1.5 L of urine in that time, regardless of most changes in mean arterial pressure. This is because of __________.
Answer:
sympathetic innervation to the afferent and efferent arterioles, tubular re absorption, and myogenic regulation
Explanation:
rate if this helps!
The pyramid above illustrates the trophic levels in a typical forest or swamp ecosystem. In the soil, the organisms play a specialized role in the ecosystem. Select all of the statements that accurately describe the role of the soil organisms
Consumers of wetlands can include fish, birds, amphibians, mammals, freshwater and/or marine invertebrates (shrimp, clams), as well as fish. It is bacteria and fungi that decompose dead creatures in wetlands.
What trophic levels in a typical forest or swamp ecosystem?A form of wetland ecosystem where trees dominate the plant life and mineral soils have limited drainage. The latter distinguishes a swamp from a marsh, where grasses make up the majority of the plant life. Swamps can be found all over the planet.
Soil texture, water quality, and topography are examples of abiotic factors that are impacted by hydrology in a wetland, whereas plant and animal species, diversity, and abundance are examples of biotic elements that are influenced by hydrology in a wetland.
Primary consumers like mice devour those. Raccoons and other secondary consumers, like them, eat the mice. Then, apex predators like alligators devour raccoons.
Therefore, primary producers in the swamp, such as trees and grasses, are the first links in the food chain.
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match the following terms with their corresponding definitions
Match the following the answer is as follow:
A-4
B-7
C-6
D-2
E-8
F-5
G-3
H-1
I-9
What is adaptation and examples?
The adaptation, they often mean a characters helps an animal or plant survive. An example is the adaptation of horses' teeth to grinding grass.
Silage is their general food; it have the teeth down, but horses' teeth restart to grow during life.
Thus, these are the anwer.
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What is the answer help quick
Answer:
Impact on environment
Pesticides can contaminate soil, water, turf, and other vegetation
Explanation:
me is smart
1) The Afrik aner population of Dutch settlers in South Africa is descended mainly from a few colonists. Today, the Afrik aner population has an unusually high frequency of the gene that causes Huntington's disease. Huntington's disease is an autosomal dominant disease and only one allele is needed for the disease (HH, Hh). The Afrik aners are an example of a founder effect. It is also an example of genetic drift. How is the founder effect related to the concept of genetic drift?
A) Reduced genetic variation of this small population means that the population may not be able to adapt to new selection pressures.
B) In a small population, the more advantageous trait becomes more common. If this continues, eventually, all individuals in the population will have Huntington's disease.
C) The small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for Huntington's disease.
D) There are three sources of genetic variation: gene flow, se xual reproduction, and mutation. In the case of the Afrik aners, once the settlers arrived in Africa, these three sources had little impact on the gene pool and variation.
Answer:
C.
Explanation:
The small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for Huntington's disease. Genetic drift, along with natural selection, mutation, and migration, is one of the basic mechanisms of evolution. In this case, it was a chance that the settlers all carried the allele for Huntington's disease.
During development, an absence of ______ protein production causes the mesonephric ducts to degenerate.
An absence of Androgen, Protein production causes the mesonephric ducts to degenerate.
AdrogenAdrogens are x hormones found in males that gives rise to human characteristics present only in male species. Adrogen leads to the growh of mesonepheric ducts while the absence of Adrogen protein production will lead to the degeneration of the mesonephric ducts.
Hence we can conclude that An absence of Androgen, Protein production causes the mesonephric ducts to degenerate.
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