The role of monoamine oxidase and acetylcholinesterase in the nervous system is to break down neurotransmitter molecules. So option c is correct.
Monoamine oxidase is an enzyme that degrades monoamine neurotransmitters such as serotonin, norepinephrine, and dopamine, as well as tyramine and phenethylamine, which are compounds present in some foods. Acetylcholinesterase is an enzyme that catalyzes the hydrolysis of acetylcholine into choline and acetic acid. Acetylcholine is a neurotransmitter that is involved in muscle contraction, sensory perception, memory formation, and other functions. A neurotransmitter is a chemical substance that transmits signals from one neuron to another neuron, a muscle cell, or a gland cell. Neurotransmitters are responsible for the vast majority of communication between neurons in the brain and other parts of the nervous system.
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What do we call objects that do not easily allow heat to travel through them?
A; Insulators
B; Idolaters
C; Protectors
D; Transfers
Answer:
Insulators do not allow heat to pass through them.
Crystal made the following table to compare the different types of faults. What needs to be corrected?
Normal Faults Reverse Faults Strike-slip Faults
Involve dip movements Involve dip movements Invovle horizontal movement
Occur at convergent boundaries Occur at divergent boundaries Occure at transform boundaries
Dip-slip Dip-slip Strike-slip
Reverse faults involve horizontal movement and are strike-slip faults.
Normal faults involve horizontal movement and are strike-slip faults.
Reverse faults occur at transform boundaries and Strike-slip faults occur at divergent boundaries.
Normal faults occur at divergent boundaries and reverse faults occur at convergent boundaries.
Reverse faults occur at transform boundaries and Strike-slip faults occur at divergent boundaries.
Sudden movement along Earth's fault lines causes earthquakes. The motion releases "elastic strain" energy that has been accumulated inside the form of seismic waves, that travel through the Earth & cause the earth to tremble. A mid-ocean ridge, or underwater mountain system created by plate tectonics, is what is referred to as the Mid-Atlantic Ridge (MAR). The "elastic rebound theory" for earthquakes refers to this steady buildup & release of stress and strain. Reverse faults happen at convergent borders whereas normal faults happen at divergent boundaries.The abrupt elastic rebounding of previously energy stored is what causes most earthquakes. Tectonic plates, which are huge chunks of the lithosphere of the Earth, split away from one another during the geologic process of seafloor spreading.
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Why is DNA replication called semi-conservative? The answer is that each daughter DNA consists of one new helix and one old helix. Explain further.
Semiconservative replication is called semi-conservative because one of strands of DNA in each of two copies of DNA is ancient and conserved whereas other is newly produced at the moment of replication.
Why is DNA replication called semi-conservative?DNA replication is called semiconservative as an existing DNA strand is used to create new strand.
DNA is a double stranded molecule and when DNA is copied, two strand of DNA (old strands) separate and new complementary nucleotides are added on two separated strands.
This process then creates two identical double stranded DNA molecules. Each DNA molecule contains one strand of original DNA molecule and one newly synthesized strand. Hence, DNA replication is called semiconservative.
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what is the correct order of stages of the cell cycle, ordered longest to shortest, in mammalian cells in culture ?Cytokinesis, Mitosis, Interphase.Cytokinesis, Interphase, MitosisMitosis, Cytokinesis, InterphaseInterphase, Mitosis, Cytokinesis
The correct order of stages of the cell cycle, ordered longest to shortest, in mammalian cells in culture is Interphase, Mitosis, Cytokinesis. Interphase, which is the longest stage, is further divided into three phases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
During G1, the cell grows and carries out its normal metabolic processes; during S, the DNA replicates; and during G2, the cell grows and prepares for mitosis. Mitosis is the stage in which the cell's nucleus divides into two identical nuclei, and it is followed by cytokinesis, the division of the cytoplasm to form two separate daughter cells.
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Why are the questions of philosophy, such as 'who are we?' and 'why are we here?', not considered scientific?
Philosophical questions like 'who are we?' and 'why are we here?' are not deemed scientific because they can't be empirically tested or quantified. Such questions deal with abstract, subjective concepts as opposed to scientific study which seeks measurable and provable results.
Explanation:The reason why philosophical questions such as 'who are we?' and 'why are we here?' are not considered scientific is because these questions cannot be empirically tested or measured. Science is concerned with examining the natural world through a structured method of observation and experimentation. It seeks answers that can be quantitatively measured and proven.
Philosophical questions, on the other hand, deal with abstract concepts and ideas that could be subjective and differs from person to person. We often use philosophy to dig into these complex questions, pondering the nature of existence, purpose, morality, consciousness, and more. While these questions indeed form a crucial part of human curiosity, they fall outside the scope of the scientific method due to their inherently subjective and unquantifiable nature.
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indicate whether the label identifies a specific or nonspecific form of defense.
The label identifies a specific or nonspecific form of defense are
Specific form: B-lymphocytes, Antibodies, Cytotoxic T-lymphocytes, and Plasma cellsNonspecific form: Skin, Neutrophils, and MonocytesWhat is non-specific immunity?The nonspecific immunity definition is the immunity you аre born with thаt provides generаlized protection аgаinst pаthogens. This generаlized defense system works аll the time to prevent infection. This is аlso cаlled innаte immunity. It includes:
Physicаl bаrriers, like skin аnd mucous membrаnesChemicаl deterrents, like аntimicrobiаl enzymes in bodily fluids аnd stomаch аcidReflexes, like coughing аnd sneezingCells, like mаcrophаges, bаsophils, аnd nаturаl killer T-cellsWhаt is specific immunity?Specific immunity, аlso known аs аcquired immunity, is developed аfter the body is exposed to specific pаthogens аs а form of future protection. It is the body's wаy of remembering whаt dаngers exist аnd how to fight them. The following cells help develop аnd retаin specific immunity.
Cytotoxic T-Cells. These cells аre identified by their аntigens.B-cells. They аttаch to а single аntigen.Аntibodies аre Y-shаped proteins thаt constаntly scаn the body for specific invаders.Helper T-Cells. They аre only аctivаted by specific pаthogens.Your question is incomplete, but most probably your full question can be seen in the attachment.
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Inside eukaryotic cells, several organelles have sections of membranes that have folds or protrusions. Examples include the inner membrane of the mitochondria, the thylakoids in the chloroplast, and the endoplasmic reticulums. What benefit do these organelles gain by having these structures?
The main benefit that these organelles gain by having folded or protruding membrane structures is an increased surface area. This increased surface area allows for more efficient functioning of the organelle by providing more space for important cellular processes to occur.
For example:
1. In the mitochondria, the inner membrane has folds called cristae, which increase the surface area for the electron transport chain and ATP production to take place more efficiently.
2. In chloroplasts, the thylakoid membranes contain the photosynthetic pigments and electron transport chain components necessary for photosynthesis. The increased surface area provided by the thylakoids allows for more efficient light absorption and energy conversion.
3. The endoplasmic reticulum (ER) has a network of membrane folds that provide more surface area for protein synthesis (in the rough ER) and lipid synthesis (in the smooth ER).
In summary, the folded or protruding structures in these organelles allow for increased surface area, which in turn enables more efficient cellular processes and better overall functioning of the organelle.
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the process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called . a) diapedesis b) chemotaxis c) margination
The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called chemotaxis. The correct answer is option b.
What is chemotaxis?Chemotaxis is a directional movement of cells in response to a chemical gradient. Cells are drawn to higher concentrations of signaling molecules or other chemicals released by a target or source, resulting in migration in the direction of the chemical concentration gradient.
This system is common among prokaryotes, algae, and fungi, as well as some animal cells, such as leukocytes (white blood cells).Chemotaxis is the process of attracting neutrophils and other white blood cells to an inflammatory site.
This process is an essential aspect of host defense against invading pathogens, as well as the regulation of immune responses, the promotion of tissue regeneration and repair, and the development and maintenance of numerous biological processes, including neuronal growth, chemorepulsion, and cellular migration.
Thus, the correct answer is option b.
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if planet y orbits the sun bur does not rotate on its axis at all how long would a daybbe on planet y
If Planet Y does not rotate on its axis at all, then one day-night cycle on the planet would take as long as one full orbit around the Sun.
This is because the definition of a day is the time it takes for one complete rotation on its axis, and if Planet Y does not rotate on its axis, it does not have a day.
Assuming that Planet Y's orbit around the Sun is circular and has a period of one Earth year (365.25 Earth days), then one day on Planet Y would also be 365.25 Earth days long. Therefore, a year on Planet Y would also be 365.25 Earth days long, and the planet would have one day and one night each year.
What is an orbit?
An orbit is the path that an object takes as it moves around another object due to the influence of gravity. In astronomy, the most common example of an orbit is the path that a planet takes as it revolves around a star. Orbits are governed by the laws of motion, particularly Kepler's laws of planetary motion, which describe how the gravitational force between two objects affects their motion.
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Complete question is: If Planet Y does not rotate on its axis at all, then one day-night cycle on the planet would take as long as one full orbit around the Sun.
These two satellite images show a region on Earth. The image on the left shows the region in 1986, and the image on the right shows the same region in 2000. The human population in the region nearly tripled during this time. Dark green regions are undeveloped areas, while purple regions have been modified for human use.
Which statement is supported by the evidence in the images?
CHOOSE AN ANSWER FROM THE PICTURE
The human population in the region increased significantly between 1986 and 2000, as evidenced by the expansion of purple regions in the image on the right.
What is human population?Human population is the total number of people living in a particular area or region. It is a measure of the size and density of a population and is generally expressed as the number of persons per unit area. Human population growth is affected by a variety of factors, such as birth and death rates, migration, economic development, and availability of resources. As population increases, so does the demand for resources, leading to increased competition for resources, increased pollution, and a greater risk of natural disasters. As a result, population growth can have both positive and negative effects on the environment and the quality of life of humans. Population growth is also associated with increased poverty, malnutrition, and other social issues.
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What happens to water after it falls as precipitation?
Answer: It becomes runoff.
Explanation: What is precipitation?
Precipitation is the step in the water cycle where water falls in a variety of forms such as rain, sleet, hail, and snow.
What is runoff?
Runoff is when the water that came down slides off of rocks, mountains, hills, etc.
After runoff occurs, the water either collects in a puddle or returns to a body of water.
what is d shape tentacles present contractile vacuoles present trichocysts defence cilia helps movement transverse division
The description provided seems to be related to the characteristics of a group of organisms known as ciliates.
Ciliates are a diverse group of unicellular eukaryotic organisms that possess hair-like structures called cilia, which are used for movement and feeding. They also have contractile vacuoles for osmoregulation, trichocysts for defense against predators, and transverse division for reproduction.
Additionally, some ciliates have tentacles that can aid in capturing food. The presence of these characteristics distinguishes ciliates from other unicellular organisms such as bacteria and archaea.
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in prokaryotes, the polymerase can synthesize rna using a dna template, but cannot initiate synthesis accurately. (True or False)
The given statement "In prokaryotes, the polymerase can synthesize RNA using a DNA template, but cannot initiate synthesis accurately" is True because RNA polymerase is an enzyme that is involved in the transcription process, where it reads the DNA template to make an RNA copy.
This RNA copy is called messenger RNA (mRNA).This enzyme is composed of several subunits, each with a unique function. The most important subunit is the catalytic subunit, which is responsible for the actual polymerization of RNA. The RNA polymerase uses a DNA template to synthesize RNA, as it cannot synthesize RNA de novo.
The RNA polymerase binds to the promoter region of the DNA, which is located at the beginning of the gene being transcribed. Once the RNA polymerase is attached to the promoter, it moves along the DNA template in a 3' to 5' direction. As it moves along, it synthesizes RNA in a 5' to 3' direction.
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which four of the following are characteristics of a yeast artificial chromosome? multiple select question. centromere sequence cos site for phage packaging a selectable marker bacterial origin of replication multicloning site telomere sequences at each end
The four of the following are characteristics of a yeast artificial chromosome are centromere sequence, a selectable marker, bacterial origin of replication, and telomere sequences at each end
Yeast artificial chromosome (YAC) is a vector that is used to clone the DNA fragments of more than 200 kb size, it is commonly used for genomic studies. In YAC, DNA of interest is cloned between two telomeres in yeast cells and YACs contain four essential features which are centromere sequence, bacterial origin of replication, telomere sequences at each end, and a selectable marker. The multicloning site and cos site for phage packaging are also included in YAC. Yeast artificial chromosomes (YACs) are used to clone large DNA fragments up to 2,000 kilobases in length.
YAC vectors contain four necessary components: a bacterial origin of replication, a centromere sequence, a telomere sequence, and a selectable marker. YAC vectors must include these components for efficient propagation in bacteria and yeast: a bacterial origin of replication to allow the vector to replicate in bacteria; a selectable marker to allow identification of cells that have taken up the vector; a centromere sequence to ensure proper mitotic segregation of the YAC and to allow for replication in yeast cells; and telomere sequences to protect the ends of the linear YAC from degradation by exonucleases. The YAC vector also contains a multi-cloning site (MCS), which allows for cloning of large DNA fragments, as well as a cos site for phage packaging.
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panthers with teeth that are too short have difficulty capturing prey while panthers with teeth that are too long have difficulty chewing their food
Answer:
Yes, this is true, but certain panthers with deviations do not survive.
Explanation:
The thing is that the teeth of predatory animals are like hands, and if they are not in good condition, then they cannot use them correctly.
which of the following statements about meiosis is false ? group of answer choices rec8 is a meiotic cohesin that links sister chromatids over their entire length at metaphase i. at anaphase i, sister chromatids remain together. at anaphase i, cohesins are retained in the centromeric region at anaphase ii, non-sister chromatids separate. unlike mitosis, homologous chromosomes pair during meiosis.
The following statement about meiosis is false is a. rec8 is a meiotic cohesin that links sister chromatids over their entire length at metaphase i.
Rec8 is a meiotic cohesin that links sister chromatids over their entire length until anaphase II. Meiosis is a type of cell division that occurs in sexually reproducing organisms, it's also known as reduction division. It happens only in reproductive cells and lowers the chromosome number by half. It is an essential process in the formation of gametes, such as egg cells and sperm cells. The five important stages of meiosis are prophase, metaphase, anaphase, telophase, cytokinesis.
Meiosis is distinct from mitosis in a variety of ways, one significant distinction is the pairing of homologous chromosomes, which is a critical feature of meiosis but not mitosis. Homologous chromosomes are chromosomes that are similar in shape and carry the same genes in the same order. They are the chromosomes that come from each parent. During metaphase I, homologous chromosomes come together to form a bivalent, which is a paired structure with four chromatids. At anaphase I, the two homologous chromosomes in each bivalent split and migrate to opposite poles and chromatids are separated during meiosis II.
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Write the adaptations of animals living in aboreal habitet.
Answer:
Arboreal animals are very well adapted to staying or hanging on to trees. Many of them have little bodies and clawed or sticky feet. Some of them have prehensile tails that they use to grasp tree branches.
Claws, adhesive pads, flexible ankle joints (such as a squirrel's) that can turn forwards and backwards are all adaptions useful for staying in place. Arboreal primates have hairless fingertips that allow the animal's hand to squeeze the branch between the fingertips to generate friction.
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in a certain plant, when individuals with blue flowers are crossed with individuals with blue flowers, only blue flowers are produced. plants with red flowers crossed with plants with red flowers sometimes produce only red flowers, although other times they produce either red or blue flowers. when plants with red flowers are crossed with plants with blue flowers, sometimes only red flowers are produced; other times either red or blue flowers are produced. which gene is dominant?
the asnswer is red, means the red flower gene is dominant.
in which organism would you expect to find hemolymph? group of answer choices toxoplasma (protist) vampire bat (mammal) meganeura (dragonfly) wood frog (amphibian) schistosoma (flatworm)
In Meganeura (dragonfly) we could expect to find hemolymph.
Hemolymph is primarily present in invertebrates and not in vertebrates such as mammals, reptiles, or birds.
What is hemolymph?Hemolymph is a term used to describe the fluid found in the open circulatory system of several invertebrates. Hemolymph, which is a combination of blood and interstitial fluid, has various functions in the body of the invertebrates. This fluid is responsible for transporting nutrients, waste products, and hormones in the body of invertebrates.
Hemolymph also provides support for the invertebrates' internal structures and serves as a cushion against shocks and sudden movements. Hemolymph, unlike blood in mammals, does not transport oxygen. Instead, invertebrates depend on a network of tubes to supply oxygen throughout their bodies.
The circulation of hemolymph through the vessels is influenced by various factors such as contraction of the invertebrate's body muscles and movement of other organs, particularly those that squeeze and stretch the hemolymph vessels.
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According to 7th day adventists,all of these are unclean animals EXCEPT?
Shrimp
Rabbit
Catfish
Croppy
Fish
The Adventists forbid eating pork, rabbit, and shellfish because they are seen as "unclean."
Some "clean" foods, including as fish, chicken, and red meats other than hog, as well as other animal products like eggs and low-fat dairy, are preferred by some Adventists. the chameleon, skink, monitor lizard, wall lizard, and gecko. They are the least clean for you of all the things that travel along the earth. After they have passed away, everyone who touches them becomes filthy until dusk. They include lobster, crab, mussels, oysters, squid, octopus, shrimp/prawns, scallops, mussels, and other shellfish) is unclean. Certain "fin fish" are included in the biblical list of unclean meals because they lack scales (for example, different varieties of tuna; blue fin and yellow fin are clean).
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Which of these substances speeds up the absorption of alcohol? a. plain water b. carbonated liquids c. starchy foods d. meat products
b. Carbonated liquids are known to speed up the absorption of alcohol as they increase the rate at which the alcohol is emptied from the stomach and enters the small intestine where it is absorbed into the bloodstream.
This is because carbonated drinks create more pressure in the stomach, which can cause the pyloric valve to open more frequently, allowing alcohol to be absorbed more quickly. Drinking water or consuming starchy foods or meat products may slow down the absorption of alcohol, but they do not speed it up.
The rate of alcohol absorption can be influenced by various factors, including the presence of food in the stomach, the concentration of alcohol in the drink, the carbonation of the drink, and other factors. Carbonated drinks have been shown to speed up the absorption of alcohol because the carbonation increases the pressure in the stomach, which can cause the pyloric valve to open more frequently. This allows alcohol to be absorbed more quickly into the bloodstream.
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These positively charged particles are found in the atomic nucleus:
A. Protons only
B. Electrons only
C. Protons and neutrons
D. Neutrons only
A. The atomic nucleus contains solely positively charged protons.
In contrast to neutrons, which are neutral particles found in the nucleus with protons, electrons are negatively charged particles that are found in the electron cloud, which is located outside the nucleus.
Atomic nucleusThe fundamental units of matter are called atoms, and they are made up of protons, neutrons, and electrons, three different subatomic particle kinds. In the nucleus, or the center region of an atom, protons are positively charged particles. Protons and neutrons can both be found in the nucleus, however neutrons, which are neutral particles and have no charge, are also present. Electrons are negatively charged particles that are located outside of the nucleus in the electron cloud or the space around it.The number of protons in an atom's nucleus determines its atomic number, which in turn establishes the element that it belongs to.learn more about atomic nuclei here
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a biological reserve that is designed for a single species is an important tool in maintaining biodiversity because a reserve: will not change over time so all the species will be conserved as long as the reserve exists. will generate income when people visit to see the biodiversity protected in the reserve. will generate income when people visit to see the biodiversity protected in the reserve. that is designed for a single species will also protect other species in the reserve.
A biological reserve that is designed for a single species is an important tool in maintaining biodiversity because a reserve that is designed for a single species will also protect other species in the reserve.
Biological reserves have become more prevalent in recent years as a method of conserving biodiversity. These reserves are specially designed to preserve the living organisms within them, making them a vital component of conservation efforts.
The best response is "a reserve that is designed for a single species will also protect other species in the reserve." Despite the fact that the reserve is designed for a single species, there will be other species in the same region that will be indirectly protected thanks to the reserve. This is due to the fact that if a single species goes extinct or its numbers decline, it will have an impact on the whole ecosystem. Therefore, preserving a single species implies preserving the entire ecosystem.
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During electron transport, which serves as a ready source for protons that can be pumped across the membrane? A. O2B. H2O C. ATP D. NADH E. glucose
During electron transport, NADH serves as a ready source for protons that can be pumped across the membrane. The electron transport chain (ETC) is the primary function of the final step of cellular respiration that leads to the creation of ATP molecules in oxidative phosphorylation.
The NADH and FADH2 molecules that are produced by glycolysis and the Krebs cycle are oxidized, releasing high-energy electrons and H+ ions that are then passed to the electron transport chain. The ETC is located in the inner mitochondrial membrane of eukaryotes and the plasma membrane of prokaryotes. During electron transport, high-energy electrons are passed through a series of electron carriers that are embedded in the membrane.
As the electrons move through the chain, they lose energy, which is used to pump protons out of the mitochondrial matrix and into the intermembrane space. This establishes an electrochemical gradient across the membrane, with a higher concentration of protons in the intermembrane space than in the matrix. The protons then flow back into the matrix through ATP synthase, which uses the energy from their movement to make ATP from ADP and inorganic phosphate.
The NADH and FADH2 molecules that enter the electron transport chain are ultimately oxidized by molecular oxygen (O2), which is the final electron acceptor in the chain. As O2 is reduced to form water (H2O), it also accepts protons that have been pumped across the membrane, allowing the electron transport chain to continue to pump protons and produce ATP.
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four muscles that originate on the scapula, wrap around the joint, and fuse to form one large tendon are called the:
Answer: rotator cuff
Explanation: The four muscles that originate on the scapula, wrap around the joint, and fuse to form one large tendon are called the rotator cuff. These stabilize the shoulder joint and allow the arm to be lifted.
Can someone please help me
Answer:
I THINK that the answer is c, but dont hold me to that, let me double check
Explanation:
targeted therapies are used in patients with a set gene expression pattern. a targeted therapy that prevents the activation of the estrogren receptor in breast cancer would be beneficiail to which type of patient
Targeted therapies are used in patients with a set gene expression pattern. A targeted therapy that prevents the activation of the estrogen receptor in breast cancer could be beneficial to patients with ER-positive breast cancer.
ER-positive breast cancer is caused by cells that have too many estrogen receptors, which can cause them to grow uncontrollably. The targeted therapy would prevent the estrogen receptor from being activated, thus preventing cell growth. This type of therapy could potentially be used as an alternative to chemotherapy, which can have negative side effects. Additionally, it could be used in combination with other treatments, such as radiation therapy, in order to maximize the efficacy of the treatment. Targeted therapies are an important part of the fight against breast cancer, and the prevention of the activation of the estrogen receptor could be beneficial to many patients.
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which of the following organisms would most likely be sensitive to natural penicillin? group of answer choices streptococcus pyogenes penicillium penicillinase-producing neisseria gonorrhoeae mycoplasma helminths
Penicillin is an antibiotic drug that specifically targets bacteria, so organisms that are sensitive to penicillin are primarily bacteria. Streptococcus pyogenes, a common cause of throat and skin infections, is highly sensitive to penicillin, as are certain species of Neisseria, such as Neisseria gonorrhoeae, which causes gonorrhea.
Mycoplasma, a type of bacteria, is also sensitive to penicillin. Penicillium, the type of fungi that produces penicillin, is, of course, not sensitive to the drug. Additionally, helminths, a type of parasitic worm, are not sensitive to penicillin because the drug only targets bacteria.
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What effect would el niño most likely have on organisms? a. el niño would cause the extinction of an entire species. b. el niño would cause changes in the genetic makeup of organisms. c. el niño would cause continents to move to different parts of the planet. d. el niño would cause organisms to move in search of food and better conditions.
The most likely effect of El Niño on organisms is: El Niño would cause organisms to move in search of food and better conditions. Therefore the correct option is option D.
Changes in sea surface temperatures and precipitation patterns brought on by El Nio may have an impact on the quantity and spread of marine organisms like plankton, fish, and marine mammals.
Terrestrial ecosystems, such as grasslands and rainforests, can be impacted by changes in temperature and precipitation, which can have an effect on the distribution and behaviour of land creatures.
In reaction to these changes, organisms may move in search of a suitable environment and food sources. It is crucial to remember that based on the particular ecosystem and the intensity of the El Nio event, the effects of El Nio on organisms can change.
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the loss of the lumbricids' trochophore larval stage is an obvious adaptation to a more terrestrial environment group of answer choices true false
The loss of the lumbricids' trochophore larval stage is a true adaptation to a more terrestrial environment because the larvae require a marine environment to survive. The absence of a trochophore stage means that the lumbricid is better adapted to the terrestrial environment and can reproduce more easily in it.
Lumbricids are earthworms that belong to the phylum Annelida. They are generally found in soils in a variety of habitats, such as forests, grasslands, and agricultural land. Lumbricids have a segmented body that is long and narrow, with a reddish-brown color. They have no legs, and instead, they move by contracting and relaxing their muscles to push themselves through the soil.The trochophore larval stage is an early stage in the development of many invertebrate animals. It is characterized by a ciliated band that encircles the animal's body, allowing it to swim freely in the water. The trochophore larval stage is seen in many marine invertebrates, such as molluscs and annelids. It is also found in some freshwater invertebrates, such as certain species of snails and clams.The loss of the lumbricids' trochophore larval stage is an adaptation to a more terrestrial environment. This adaptation enables the lumbricids to live in soils instead of water. Since the trochophore larval stage is adapted to a free-swimming lifestyle in water, it is no longer necessary for lumbricids living on land. Instead, lumbricids have evolved a direct mode of development, in which they hatch from eggs and develop directly into miniature versions of adults.Learn more about trochophore larval stage: https://brainly.com/question/26971426
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