Phylogenetics relates organisms to one another based on genetic distance that increases with evolutionar time. This principle requires the use of what kind of genes in order to give accurate relationships?

Answers

Answer 1

Neutral DNA markers must be used in investigations if scientists are to gain an accurate assessment of phylogenetic relationships.

A phylogenetic tree is a tool used by scientists to depict the connections and evolutionary paths among organisms. A phylogenetic tree is a type of diagram that shows the evolutionary links between different kinds of living things.

Phylogenetic approaches can be broadly divided into two categories: character-based methods and distance-based methods.

A phylogenetic tree's branching pattern illustrates how many species or other groups developed from a number of common predecessors. In trees, two species are more closely related if they share a recent common ancestor and less closely related if they do not.

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Related Questions

when a person cries, tears are exported from cells. which category of transport most precisely matches this process?

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The process of exporting tears from cells involves an active transport mechanism known as exocytosis.

What is exocytosis?

Cells transfer chemicals, such as hormones or proteins, to the exterior of the cell through a process called exocytosis.

When tears are produced, the cells in the lacrimal glands that do so release the fluid by a process called exocytosis, which enables it to leave the cell and enter the tear ducts.

A vesicle or membrane-bound organelle carrying the material to be released fuses with the cell membrane during exocytosis, enabling the release of the contents of the vesicle outside the cell.

Thus, exocytosis is the type of transport that best describes the method by which cells export their tears.

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Does protein expression begin with transcription or translation?
a. translation
b. transcription

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Option B, transcription describes protein expression begin with.

Protein expression is the process by which a gene is transformed into a functional protein, and it begins with transcription. Transcription is the first step in the process and evolution the transfer of genetic information from DNA to RNA, specifically messenger RNA (mRNA). The mRNA molecule carries a copy of the genetic information from the DNA to the ribosome, where translation occurs. Translation is the process by which the genetic information in the mRNA is used to construct a protein molecule. The ribosome reads the sequence of codons in the mRNA and uses it to assemble the corresponding evolution of amino acids to form a protein. Thus, transcription is the first step in the process of protein expression, and it must occur before translation can take place.

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Brooke was supposed to visit her mother for dinner. However, the sun is setting and Brooke has a flashback to a car accident she had when she drove at night. She is very shaken and decides not to go. Brooke would likely be diagnosed with

post-traumatic stress disorder
a specific phobia
obsessive-compulsive disorder
major depressive disorder

Answers

Brooke would likely be diagnosed with post-traumatic stress disorder. Hence, the correct option is A.

What do we understand by post-traumatic stress disorder?

A terrifying event can result in post-traumatic stress disorder (PTSD), a mental health condition brought on by witnessing or experiencing it. A few possible symptoms include flashbacks, nightmares, excruciating anxiety, and uncontrollable thoughts about the incident. Get enough sleep, eat a healthy diet, exercise, and unwind. Caffeine and nicotine should be limited or avoided because they can exacerbate anxiety. Self-medication should never be attempted. Although it may be tempting to use alcohol or drugs to dull your emotions, doing so is harmful.

There is no known cure for PTSD, as there is for the majority of mental illnesses, but the symptoms can be successfully managed to allow the patient to resume normal functioning. The best option for is to combine medication and therapy.

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Answer:

PTSD

Explanation:

What happens to the hybrid zone when gene flow is established?
Hybrids cease to be formed. gene flow between distinct gene pools. mixed ancestry. genetic background to integrate

Answers

The hybrid zone tends to contract and then vanish if gene flow is established.

What is hybrid zone?

A hybrid zone is a location where two distinct species or populations can coexist and interbreed, giving rise to offspring with a mixture of genetic features. When geographic barriers that historically separated populations are removed or when environmental changes open up new chances for interbreeding, hybrid zones may develop. Hybridization can occasionally result in the creation of new hybrid species that are more suited to their environment than their parent populations. Hybridization, on the other hand, can occasionally result in decreased fitness and genetic oddities, which eventually cause the two populations to separate and diverge. Scientists may have a rare opportunity to investigate the mechanisms of evolution, adaptation, and speciation in hybrid zones.

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In what ways do the macroscopic features of bacterial colonies differ than those of molds?

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Mold colonies tend to be fuzzy, but bacterial colonies are often smooth. While germs exist in a range of hues, moulds are often white, grey, or green in appearance.

What kinds of bacteria colony are there?

Bacterial colonies can be classified as round, asymmetrical, filamentous, spindle, rhizoid, or concentric based on their shape. They are classified as whole, lobate, undulate, filaments, and irregular based on the form of their edge.

How can a bacterial colony be recognised?

Each distinct colony contains a single cell membrane or group that has undergone recurrent division. The resultant cells have gathered to create an observable patch due to being retained in one location. The majority of bacterial colonies have a colour that is either white or creamy yellow and have a roughly round shape.

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herbivory on brassica plants can induce the production of defensive chemicals such as glucosinolates. for example, one of the effects of these chemicals is to inhibit the growth of plant-eating caterpillars. What are other ways to be able to provide defense for plants so that they are not eaten by pests?

Answers

Plants have evolved various mechanisms to defend themselves against herbivores and other pests. Here are some examples:

Physical defenses: Plants can have physical structures that make it difficult for herbivores to eat them, such as spines, thorns, and tough or hairy leaves. Some plants also have tough bark that protects them from damage by larger animals.Chemical defenses: Plants can produce a variety of chemicals that are toxic or unpleasant to herbivores. Some plants produce alkaloids, terpenoids, or phenolic compounds that are toxic to herbivores, while others produce compounds that make them taste bad or smell unpleasant.Induced defenses: Plants can produce defensive chemicals in response to herbivory or other stressors, such as damage from pathogens or extreme temperatures. For example, jasmonic acid is a signaling molecule that triggers the production of defensive compounds in many plant species.Mimicry: Some plants mimic the appearance or chemical profile of other organisms to deter herbivores. For example, some orchids produce flowers that resemble female wasps, which discourage male wasps from landing on the flowers and potentially damaging them.Mutualistic relationships: Some plants have evolved mutualistic relationships with other organisms, such as ants or parasitic wasps, that help to defend them against herbivores. In exchange, the plant provides food or shelter for the other organism.

These are just a few examples of the many ways that plants can defend themselves against herbivores and other pests. Plant defense strategies can be highly diverse and complex, and often involve multiple mechanisms working together to provide protection.

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What occurrences could lead to the extinction of a rare species?

Select all that apply.

-enacting laws that limit habitat destruction
-environmental conservation
-introducing a foreign species
-cutting down of forests
-burning of fossil fuels​

Answers

Answer:

Explanation:

The occurrences that could lead to the extinction of a rare species are:

cutting down of forests

introducing a foreign species

burning of fossil fuels

While enacting laws that limit habitat destruction and environmental conservation can help protect and preserve rare species, they are not the direct cause of their extinction. The destruction of their natural habitats, introduction of invasive species that compete for resources, and the negative impacts of climate change brought about by the burning of fossil fuels are among the main factors that can contribute to the extinction of rare species.

Answer:

cutting down of forests

habitat destruction

introduction of a foreign species

environmental pollution

Explanation:

These are some of the occurrences that could lead to the extinction of a rare species. Enacting laws that limit habitat destruction and environmental conservation can help to prevent species extinction. However, the burning of fossil fuels can contribute to environmental pollution and negatively impact many species.


ALLEN

Why are Archaea considered a monophyletic group according to the three-domain hypothesis? a. Because this group includes all organisms except eukaryotes. b. Because this group includes an ancestral population and all of its descendants. c. Because all members of this group lack membrane-bound organelles. d. Because this group evolved after the origin of bacteria

Answers

This group consists of a population from the past and each of its offspring. In accordance with the three-domain idea, Archaea is therefore regarded as a monophyletic group.

Considering that this group consists of the ancestral population with all its offspring. All organisms were identified as methods are divided into two primary lineages, either prokaryotes or eukaryotes, in early theories on the taxonomy of life. Indeed, Archaea and Eukarya—not Archaea and Bacteria—form a monophyletic group. Despite the fact that on the surface archaea appear to resemble bacteria more than eukaryotes, these relationships show that archaea are more closely linked to eukaryotes than it is to bacteria. Any of a group or single-celled prokaryotic creatures known as archaea, or members of the domain Archaea, differ from bacteria (the other, more well-known category of prokaryotes) and eukaryotes molecularly.

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What are the 4 categories of eukaryotic microorganisms?

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The four categories of eukaryotic microorganisms are Protozoa, Fungi,

Algae, Parasitic worms.

Protozoa: These are single-celled organisms that are typically motile, and they can be found in a variety of environments including soil, water, and in the bodies of other organisms. Some protozoa are free-living, while others are parasitic and cause diseases such as malaria and sleeping sickness.

Fungi: These are organisms that include yeasts, molds, and mushrooms. They are heterotrophic, meaning that they obtain their nutrients from other organisms. Fungi can be found in a variety of environments, including soil, water, and on living organisms.

Algae: These are photosynthetic microorganisms that are found in aquatic environments such as oceans, lakes, and ponds. They can be single-celled or multicellular and come in a variety of shapes and sizes.

Parasitic worms: These are multicellular organisms that include various types of worms that are parasitic in nature. They can be found in a variety of hosts including humans, livestock, and pets. Examples include tapeworms and roundworms.

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the thin space between the parietal and visceral layers of the serous pericardium is the ______ cavity.

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Its ‘pericardial’, hope this helps:)

what are hair-like structures found in lung cells?

Answers

Answer:

cilia

found along the bronchi

gravity is perceived by the cell, possibly by the sinking of:_____.

Answers

Gravity is perceived by cells, possibly by the sinking of organelles called statoliths.

Statoliths are dense, heavy organelles that accumulate in the cytoplasm and can act as gravity sensors. They are typically found in plant cells and some algae, where they are thought to play a role in gravity perception and response.

When a plant is exposed to gravity, the statoliths settle to the bottom of the cell, applying mechanical force on the cytoplasm and the cell membrane. This force is sensed by the plant, which then responds by altering the orientation of its shoots and roots to optimize growth and maximize light exposure.

The exact mechanisms by which statoliths sense gravity and transmit the signal to the rest of the cell are not well understood, but it is believed that the movement of the statoliths triggers changes in the distribution of other cellular components, including ion channels and signaling pathways. This, in turn, modulates gene expression and regulates the growth and orientation of the plant.

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the effects of genetic drift are more pronounced in smaller populations.T/F

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True. The effects of genetic drifts are more pronounced in smaller populations. Genetic drift is a mechanism of evolution that occurs when random events cause changes in the frequency of alleles (different versions of a gene) in a population.

Genetic drift is more pronounced in smaller populations because chance events can have a larger impact on the allele frequencies in the population. In a larger population, chance events are more likely to be balanced out by other events, and the overall impact on allele frequencies is less pronounced. As a result, genetic drift can have a greater effect on smaller populations, leading to a reduction in genetic variation and potentially causing alleles to become fixed (where all individuals in the population have the same allele) or lost (where an allele is no longer present in the population). This can have important consequences for the genetic makeup and evolutionary potential of the population.

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which of the statements do you think best describes the way that base pairing stabilizes the double helix of dna? A. A-T pairs have fewer H-bonds to break, so it requires less energy. B. One base pair has an effect on another. C.Two factors are mainly responsible for the stability of the DNA

Answers

The statement that best describes the way that base pairing stabilizes the double helix of DNA is B. One base pair has an effect on another.

The double helix structure of DNA is stabilized by the complementary base pairing between nucleotide bases. Adenine (A) always pairs with thymine (T) and guanine (G) always pairs with cytosine (C). The bases are held together by hydrogen bonds between the nitrogenous base pairs, with A-T forming two hydrogen bonds and G-C forming three hydrogen bonds.

The interaction between the base pairs is what provides the stability to the DNA double helix. The complementary base pairs fit together like a lock and key, and the hydrogen bonds between the bases provide an attractive force that keeps the two strands of the helix together.

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______ are thickened regions of muscle that function like valves to control the flow of contents at various points in the gi tract.

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Sphincters are thickened regions of muscle that function like valves to control the flow of contents at various points in the gi tract.

Sphincters, which resemble ring-shaped muscles, create valves in the digestive system. The gastro-esophageal sphincter, also known as the cardiac sphincter, is situated at the oesophagus' stomach end. This sphincter opens in reaction to swallowing and the pressure put on it by the food bolus, allowing the bolus to enter the stomach. Those in the gastrointestinal (GI) tract assist in controlling the passage of bile and digestive enzymes into the intestines as well as the movement of food from the oesophagus to the anus. This sphincter closes when there is no swallowing motion, preventing stomach contents from ascending the oesophagus. Acid reflux, sometimes known as "heartburn," happens when the digestive system's acidic contents leak into the oesophagus.

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In stabilizing selection, what occurs in a population?
a. The population shifts toward one of two extreme phenotypes.
b. Both extreme phenotypes shift toward the middle.
c. The intermediate phenotype becomes more common.
d. The intermediate phenotype becomes rare.

Answers

The intermediate phenotype becomes more common In stabilizing selection

When stabilizing selection occurs, what happens in a population?

When natural selection favors an average phenotype and excludes extreme deviations, stabilizing selection reduces the genetic variance of a population. When exposed to environmental changes, a population's genetic variation shifts toward a new phenotype, which is known as directional selection.

The population undergoes stabilizing selection when selective pressures choose between two extremes of a trait. For instance, stabilizing selection may have an impact on plant height. If a plant is too short, it might not be able to compete for sunlight with other plants.

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studies have found that certain chemicals that help repair damaged cells only function while we sleep. what theory best explains this? a. 80 b. 20 c. 30 d. 50

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Studies have found that certain chemicals that help repair damaged cells only function while we sleep. The theory that best explains this is 80. Therefore, the correct option is A.

What is the 80/20 Sleep theory?

The “80/20 Rule” of sleep basically states that you should adhere to your regular pattern and schedule 80% of the time. The remaining 20%, though, gives you some leeway while still adhering to your child's healthy sleep guidelines.

This implies that you are allowed to occasionally stay up late or take a little sleep. Setting an earlier bedtime will keep you well-rested while allowing you to participate in a daytime activity very actively. Therefore, the correct option is A.

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The small bulge at the end of the axon that sends messages to other neurons are called:_________

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"Axon terminals" are the tiny protrusions at the end of axons that communicate with other neurons.

A neuron's axon is a long, slender projection that extends from the cell body and carries nerve impulses away to other neurons or muscles.

The axon terminal, also referred to as a terminal button, synaptic knob, or synaptic terminal, is a small, bulbous structure at the end of the axon.

Neurotransmitters, which are chemicals that transmit signals across synapse, the minuscule space between an axon terminal and the dendrites of other neurons, are kept in synaptic vesicles, which are found in the axon terminal.

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Why do you think humans cannot store energy?

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which is not of any specific use because electrical energy, and the forms in which we store it, are commonly very low entropy systems.

Why can't we store energy?

The lower the destruction the more they "want" to energy dissipate and the harder it is to stop that propensity to turn into (ultimately) heat.

Electrical energy is a continuous flow of electrons that move within a conductor. To want to supply it in that form is energy as unrealistic as wanting to store wind. So to do it, you have to change the electricity into another form (chemical, for example, like batteries) and turn it back into electricity when you required it.

So we can conclude that  The basic difficulty is that energy electricity is a flow of energy that travels at almost the speed of light. That makes storage very hard.

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what is the primary function of myoglobin in the body of humans and animals?

Answers

Answer:

Myoglobin facilitates oxygen diffusion. Myoglobin desaturates at the onset of muscle activity, which increases oxygen's diffusion gradient from the capillaries to the cytoplasm. Myoglobin has also been shown to have enzymatic functions. It is necessary for the decomposition of bioactive nitric oxide.

Explanation:

Write the complementary pair for this sequence


3' ATGGCTACAAAGCC5'

Answers

The complementary of A is T and for G is C, therefore the complementary sequence should be …. TACCGAACT

What is the complementary sequence for 5 ATCG 3?

Adenine builds the double bond with thymine while guanine makes the triple bond with cytosine which method adenine and thymine complementary base pairs and cytosine and guanine are complementary base pairs. The complementary sequence for the DNA shore 5' ATCGAACGT 3' is 3' TAGCTTGCA 5'.

Because of complementary base-pairing, this action generates a new strand of mRNA that is ordered in the 3' to 5' direction. As the RNA polymerase continues

So we can conclude that For the DNA strand 5'-TACGATCATAT-3' the right complementary DNA ... First write the accurate base pairing below the original sequence and ...

Missing:

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put the following stages of the cell cycle in order:G2,S,G1,M​

Answers

Answer:

G1, S, G2, M

Explanation:

The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage).

what would be the fate of a drosophila larva that inherits two copies of a mutant bicoid gene (one mutant allele from each heterozygous parent)?

Answers

A drosophila larva that inherits two copies of a mutant bicoid gene from each heterozygous parent would not develop a head or thorax.

The mutant bicoid gene is essential in establishing the anterior-posterior axis of the fly embryo, with high levels of the bicoid protein present at the anterior end of the embryo. Without functioning bicoid heterozygous parents protein, the larva would fail to develop the head and thorax structures, resulting in a lethal phenotype. In wild-type individuals, the bicoid gene is inherited maternally, with the mother depositing bicoid protein into the egg during oogenesis. Therefore, the inheritance of two mutant bicoid alleles from the heterozygous parents would result in a complete loss of bicoid protein and a failure to develop anterior structures, leading to the death of the larva.

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f the doubling time for a bacterial species is 30 minutes and there are two cells at the start, what is the population size after 2 hours?

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f the doubling time for a bacterial species is 30 minutes and there are two cells at the start,  the population size after 2 hours be 32cells

Since the doubling time for the bacterial species is 30 minutes, the number of cells will double every 30 minutes. After 2 hours (or 120 minutes), there will be 4 doublings:

After 30 minutes, there will be 2 x 2 = 4 cells
After 60 minutes, there will be 4 x 2 = 8 cells
After 90 minutes, there will be 8 x 2 = 16 cells
After 120 minutes, there will be 16 x 2 = 32 cells
Therefore, the population size after 2 hours would be 32 cells.

It's worth noting that bacterial growth is rarely so predictable in real-world scenarios, as factors like competition for resources, changes in the environment, and cell death can all affect the growth rate and population size of bacterial populations. However, the concept of exponential growth and the doubling time can be useful for understanding the basic principles of bacterial growth and the potential consequences of uncontrolled bacterial proliferation.

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What are the inner mass cells of blastocyst?

Answers

An embryo's early development includes a component known as the inner cell mass (ICM), also known as the embryoblast (or pluriblast in marsupials). The blastocyst's mass of cells is what eventually gives rise to the fetus's distinct structures.

What is cells of blastocyst?

A ball of cells known as a blastocyst develops in the first five to six days of pregnancy, shortly after a sperm fertilizes an egg. It embeds itself in the uterine wall, developing into an embryo and subsequently a fetus. An important stage in the development of an amphibian embryo is the blastocoel. It allows for cell movement during gastrulation and prevents premature interaction between the cells below and above the blastocoel.

What cells make up blastocyst?

The blastocyst is made up of three cell lineages: extraembryonic TE cells, primitive endoderm (PE) cells, and pluripotent epiblast (EPI) cells, which contribute to the placenta or yolk sac, respectively.

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the system of membranous saccules that is studded with ribosomes and capable of producing proteins is the

Answers

The system of membranous saccules that is studded with ribosomes and capable of producing proteins is termed as rough endoplasmic reticulum, or rough ER .

Function of rough endoplasmic reticulum :-

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

Structure of the Rough Endoplasmic Reticulum -

The structure of the rough ER is also intimately involved with the presence of cytoskeletal elements – especially microtubules. When microtubule structure is temporarily disrupted, the ER network collapses and reforms only after the cytoskeleton is reestablished. Changes to the pattern of microtubule polymerization are also reflected in changes to ER morphology.

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what is the advantage of a mature red blood cell having aflattened shaperather than a spherical shape?

Answers

The flattened shape of red blood cells is critical for their ability to efficiently transport oxygen and carbon dioxide throughout the body.

The advantage of a mature red blood cell having a flattened, discoid shape rather than a spherical shape is that the flattened shape provides a larger surface area-to-volume ratio, allowing for more efficient gas exchange.

Red blood cells, or erythrocytes, are responsible for transporting oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs. The flattened shape of red blood cells allows them to stack and form a biconcave shape, which provides a larger surface area for gas exchange to occur. This is important because it allows for more efficient diffusion of oxygen and carbon dioxide across the cell membrane. Additionally, the flattened shape of red blood cells allows them to be more flexible and better able to navigate through the narrowest capillaries and blood vessels, which is essential for their function in delivering oxygen to tissues throughout the body.

If red blood cells were spherical, their surface area-to-volume ratio would be lower, making gas exchange less efficient. They would also be less flexible and have a harder time navigating through narrow capillaries and blood vessels.

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Different types of cells can have certain organelles and structures in common. Which types of cells definitely contain cell walls?a. plant and animal cellsb. plant and eukaryotic cellsc. plant and prokaryotic cells d. animal and eukaryotic cells

Answers

Although not all cells have cell walls, they can be found in both prokaryotes and eukaryotes. A structure outside the plasma membrane is the cell wall, which is seen in Figure 1's depiction of a plant cell.

A cell wall is not present in every cell, although every cell has a cell membrane. Since cell walls are so tough, moving the cell is more difficult. Cell walls differ between bacterial and plant cells because they can be composed of a range of materials. Moreover, there are a few cells that literally do not have cell wall and they are known as animal cells.

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What specific neurotransmitter is released during neuromuscular junction?

Answers

Acetylcholine is a specific neurotransmitter is released during neuromuscular junction.

NeurotransmitterAlthough motoneurons and presynaptic terminals of rodent endplates from the extensor digitorum longus (EDL) and soleus muscles are positive for glutamate labelling, acetylcholine (ACh) is still the main neurotransmitter at the vertebrate neuromuscular junction (NMJ).Acetylcholine serves as the primary neurotransmitter in the parasympathetic nervous system, a component of the autonomic nervous system (a branch of the peripheral nervous system) that slows the heart rate, relaxes smooth muscles, widens blood vessels, and produces more body secretions.It contributes to neuroplasticity, memory, arousal, and learning. Additionally, it helps people maintain focus and helps the brain's reward system work by activating sensory functions when they first awake.

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which 3 kingdoms are in the bacteria domain

Answers

The Tree of Life is currently divided into three kingdoms, bacteria, archaea and eukaryotes. By studying genetic characteristics scientists currently divide all living organisms into three kingdoms named bacteria, archaea and eukaryotes when they depict the "Tree of Life."

BACTERIA
ARCHAEA
EUKARYOTES
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