The embryonic of these groups is contained in the thinnest layer. It is not found in every chordate. All chordates have paired gill pouches, a notochord, and a dorsal nerve cord. Amnion is the correct response, thus.
"The notochord, single, ventral, tubular nerve cord, pharyngeal pouches, and postanal propulsion tail are the four distinguishing features that, when combined, differentiate chordates from all other phyla.The embryonic of these groups is contained in the thinnest layer. It is not found in every chordate. All chordates have paired gill pouches, a notochord, and a dorsal nerve cord. Amnion is the correct response, thus. The organisms in the chordates can be identified by four distinct characteristics: 1) the development of an offer a range past the anus; 2) a pliable rod spanning the width of the individual's body called the notochord, upon which the remainder of the spinal column depends for stability; 3) a hollow dorsal nerve cord (... All vertebrates qualify as chordates and have the same anatomical and morphological features, including an ectoderm, a hollow dorsal nerve cord, pharynx slits, and a comment tail.
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scientists estimate that whaling activity in the 19th and early 20th centuries had reduced the number of adult female southern right whales to as few as sixty individuals by 1920. this reduction resulted in a genetic bottleneck for the species. treaties to stop whaling have substantially increased the number of southern right whales. despite this increase, the bottleneck still threatens the future of the species. which capacity of the species is most severely diminished by the bottleneck?
a. acquiring random mutations
b. responding to environmental changes
c. maintaining a healthy social structure
d. remaining genetically stable.
The capacity of the southern right whale species that is most severely diminished by the bottleneck is the ability to remain genetically stable and maintain a diverse gene pool.
A genetic bottleneck is a reduction in the size of a population that leads to a loss of genetic diversity. This can occur due to a number of factors, including natural disasters, disease outbreaks, or human activities such as hunting or habitat destruction. In the case of the southern right whales, the population was severely reduced by whaling activity in the 19th and early 20th centuries, leading to a genetic bottleneck. The capacity of the species that is most severely diminished by the bottleneck is the ability to maintain a diverse gene pool, which is necessary for the species to adapt to changing environmental conditions and respond to new challenges. When a population experiences a genetic bottleneck, the number of different genes available for selection is reduced, leading to a loss of genetic diversity. This can make it more difficult for the population to adapt to new challenges and can increase the risk of extinction.
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Dna damage checkpoints are crucial for preventing cell proliferation when dna damage has occurred. The role of dna checkpoint proteins in the cell cycle is closely tied to the roles of dna repair enzymes, although these proteins perform different functions. Which of the statements is true for dna checkpoint proteins and not true for dna repair enzymes?.
The purpose of checkpoint proteins is to stop mistakes from occurring in the genetic material that is being copied at certain periods in the cell cycle. These checkpoint proteins stop the cycle from continuing if the mistake is found.
An interruption in the cell cycle known as a DNA damage checkpoint is brought on in response to DNA damage in order to ensure that the damage is fixed before cell division restarts. At the G1/S or G2/M borders, proteins that build up at the damage site often trigger the checkpoint and stop cell development.
DNA damage checkpoints are crucial milestones that ensure efficient damage repair during the cell cycle. Genomic integrity is lost as a result of checkpoint function loss, which also permits the accumulation of genetic damage in daughter cells. One of the key contributors to DNA aberrations in cancer is checkpoint insufficiency.
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visceral reflex arcs do not control: question 24 options: blood pressure. heart rate. digestion. voluntary muscle functions
Visceral reflex arcs do not control voluntary muscle functions.
Visceral reflexes necessitate a glandular or non-skeletal muscular reaction performed in internal organs like the heart, blood vessels, or structures of the GI tract.
To elicit their actions, they use neurons of the autonomic nervous system. Sneezing, coughing, swallowing, vomiting, pupil dilation, and contraction of smooth muscles of hollow organs in various organ systems are examples of visceral reflexes.
The autonomic nervous system branch of the visceral reflex arc commences with the central neuron's projection along the preganglionic fiber. This fiber then connects to a ganglionic neuron and projects to the intended effector.
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7) What is the purpose of this exchange of genetic material during crossover? Why is it important?
The exchange of genetic material during crossover, also known as recombination, is a process that occurs during meiosis, the process of cell division that produces eggs and sperm cells. During meiosis, genetic material from the mother and father is combined in the offspring. This process is important because it increases the genetic diversity of the offspring, which can help the organism adapt to changes in its environment.
Crossover occurs when homologous chromosomes, which are pairs of chromosomes that contain similar genetic information, exchange pieces of DNA during meiosis. This exchange of DNA creates new combinations of genetic material that were not present in the mother or father.
Overall, the purpose of crossover is to increase the genetic diversity of the offspring, which can increase the chances of survival and reproduction in a changing environment. Crossover is therefore an important process that helps organisms adapt and evolve over time.
The purpose of this exchange of genetic material during crossover to vary the programming of a chromosome or chromosomes from one generation to the next.
Crossover is a cellular process that occurs when chromosomes of the same type are joined together during meiosis. When two chromosomes (one from the mother and one from the father) meet, parts of the chromosome can be swapped. Although the two chromosomes contain the same genes, they may have different gene shapes.
Let's say that the gene shape from the mother can be transferred to the father's chromosome and vice versa .This is a very interesting and important biological activity. Different combinations of different genotypes can then be passed on to offspring. This genetic variation helps increase species diversity. Diversity also enhances a species' ability to respond to its changing environment over time, thereby evolving.
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if a set of instructions that determines all of the characteristics of an organism is compared to a book, and a chromosome is compared to a chapter in the book, then what might be compared to a paragraph in the book? select one: a. a starch molecule b. a dna molecule c. an amino acid d. an egg
A DNA molecule (b) might be compared to a paragraph in the book.
The molecule that carries the genetic information necessary for an organism's growth and operation is called deoxyribonucleic acid, or DNA for short. The double helix form of DNA is made up of two connected strands that spiral around one another to resemble a twisted ladder. The backbone of each strand is composed of alternating deoxyribose and phosphate groups.
Adenine (A), cytosine (C), guanine (G), or thymine are the four bases that are joined to each sugar (T). The bases form chemical connections with one another, adenine with thymine and cytosine with guanine, which bind the two strands together. Biological information, such as the directions for constructing a protein or RNA molecule, is encoded in the base sequence along the backbone of DNA.
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There is a total of___alleles in this population. there are____alleles in the population.
In this population, there are 8 different alleles altogether. In the general population, there are 5F alleles.
What are examples and alleles?For instance, the same trait, eye color, is determined by two alleles that, respectively, code either black eyes & brown eyes. All of an object's alleles together make up its genotype. A person's genotype is referred to as homozygous if a group of genotypes are similar to one another.
What does an effective allele go by?Dominant describes the relationship between two genetic variations. An adolescent inherits one of each of the two alleles for each gene from each parent. If the polymorphisms of a gene be diverging, only one allele—the dominant gene—will be translated.
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when a neuron discharges an electric signal, it is referred to as . a. the threshold level b. an action potential c. the threshold stimulus d. a membrane potential
When a neuron discharges an electric signal, it is referred to as an action potential.
The correct option is B.
Is a neuron a brain cell?The brain's neurons also comprise the cells that receive and send chemical and electrical impulses. They work as the building blocks of the brain and as standardized services over the network for all of the muscles, tissues, and neurons in the body. Neurons, or nerve cells, are the fundamental constituents of the nerves and are responsible for receiving sensory data from the external world.
Where is neuron?The basic functional element of the brain is the neuron, a specialized cell designed to transmit information to other brain cells, muscle cells, or gland cells. Neurons are cells of the neurological system that transmit data to other nerve, muscular, and gland cells. Axons, cell bodies, and dendrites are features found in the majority of neurons.
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muscles inserts into the medial aspect of the base of the proximal phalanx of the 2nd toe and its extensor expansion?
1st dorsal interosseous muscles inserts into the medial aspect of the base of the proximal phalanx of the 2nd toe and its extensor expansion.
According to human anatomy, the interphalangeal joints of the index, middle, and ring fingers, as well as the metacarpophalangeal joints, can extend and flex thanks to the four muscles collectively known as the dorsal interossei (DI). They also assist in separating the fingers from the centre of the hand (ray of middle finger). There are four dorsal interossei on each hand. They are distinguished from the palmar interossei, which are located on the anterior side of the metacarpals, by the term "dorsal." The metacarpal bone is one of the two adjacent metacarpal bones from which each bipennate dorsal interosseous muscle that is implanted in the finger emerges.
The complete question is:
Which of the following muscles inserts into the medial aspect of the base of the proximal phalanx of the 2nd toe and its extensor expansion.
a. 2nd dorsal interosseous
b: 1st plantar interosseous
c: 1st dorsal interosseous
d. 2nd plantar interosseous
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why are there fewer trna anticodons than the 61 needed to match each mrna codon that codes for an amino acid?
There is some flexibility in pairing between the 3' base of the codon and the 5' base of the anticodons.
The typical genetic code uses fewer than 61 transfer RNAs to convert 61 codons into 20 amino acids (tRNAs). This is made feasible by the tRNA's capacity to "wobble" at the third nucleotide in order to decode several codons. Although the anticodon-codon mapping of tRNA to mRNA is a need for some codon usage indices and can help us understand the development of different genetic codes, such assays are frequently too expensive and complex to detect experimentally. Instead, using the wobble laws and theoretical deductions about nucleotide binding, the codon reading is approximated. Unfortunately, all of the subtleties of codon reading are not covered by these principles. This study examines the tRNAs' ability to read codons and how evolution has affected codon usage
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Name the phase:
Phrophase
Anaphase
Metaphase
Telophase
Answer: Anaphase
Explanation: It doesn’t look like any of the other phases
Answer:
Prophase
Explanation:
I got this answer from my bio book. hope it helps
__ attached to proteins, stick out from the plasma membrane to define the cell's characteristics and help identify chemical signals. Might help fighting cells to recognize and attack a potentially harmful cell.
Carbohydrate groups attached to proteins, stick out from the plasma membrane to define the cell's characteristics and help identify chemical signals.
Carbohydrate groups are present only on the outer surface of the plasma membrane and are attached to proteins, forming glycoproteins, or lipids, forming glycolipids.Carbohydrates are divided into four major groups based on the degree of polymerization: monosaccharides, disaccharides, oligosaccharides, and polysaccharides.Carbohydrates are probably the most abundant and widespread organic substances in nature, and they are essential constituents of all living things. Carbohydrates are formed by green plants from carbon dioxide and water during the process of photosynthesis. Carbohydrates serve as energy sources and as essential structural components in organisms; in addition, part of the structure of nucleic acids, which contain genetic information, consists of carbohydrate.
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Which of the following would not be seen in a cross section through the woody part of a root?a. sclerenchyma cellsb. parenchyma cellsc. sieve-tube elementsd. root hairse. vessel elements
d. root hairs
The root hairs cannot be seen through the woody part of a root
The reason for this is that because of the integration of the apiblama during secondary growthence, the transverse section of the soft woody part of the root will not reveal the presence of root hairs.
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which skeletal muscle is innervated by the accessory nerve, originates on the occipital bone thoracic vertebrae, and inserts on the clavicle and scapula?
Trapezius skeletal muscle is innervated by the accessory nerve, originates on the occipital bone thoracic vertebrae, and inserts on the clavicle and scapula.
Trapezius skeletal muscle is the triangle shaped muscle present in posterior of the body. Vertically it begins from skull and ends at vertebral column and horizontally it reaches both the shoulders. The XI cranial nerve is the accessory spinal nerve.
The accessory nerve is curved and plays crucial role in movement of neck and shoulder. Also, it performs communication and signalling between brain and larynx, soft palate and pharyngeal constrictors.
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what is the definition of epigentics? multiple choice a single gene having multiple phenotypic effects
The term "epigenetics" is Gene expression alterations that are reversible are transferred from cell to cell
Epigenetics is the study of how particular genes or proteins linked with particular genes are altered chemically in an organism. How genes are expressed and utilised by cells can be defined by epigenetic changes. Epigenetics is the study of how environmental factors and behavior may alter how your genes function. While epigenetic alterations are reversible and do not alter your DNA sequence like genetic changes do, they can alter how your body interprets a DNA sequence. The frequency or timing of protein synthesis from your genes' instructions is referred to as gene expression.
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Check the picture.
Water has formed from condensation.
This water comes from what PROCESS?
Answer:
transpiration.
Explanation:
Transpiration is a process that involves loss of water vapour through the stomata of plants.
How do the wind, water, animals, and ballistic mechanisms aid in the pollination and seed dispersal of plants?
When fruits with less-than-sturdy seed coats allowing the seeds to disperse effectively. When fruit falls to the ground, additional forces like water, wind, birds, or animals may carry it and aid in the dispersal of seeds.
What is pollination and examples?Pollination is the movement of pollens from stamens, which are the components of flowers that create them, to the organs that contain ovules or to the oocyte (precursors of seeds), themselves. Pollen is just captured in a drip of fluid generated by the ovule in plants with exposed ovules, such as coniferous trees and cycads.
Where does pollination occur?Either the same crop or a different plant is pollinated. Pollinating animals including birds, bees, bats, caterpillars, moths, beetle, and other creatures, as well as the wind, transfer pollen within flowers or transport it from one bloom to another during the pollination process.
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what structural aspect of pathogenic streptococcus pneumoniae serves as the basis for classification of antigenically different serotypes?
One factor that affects the virulence of the organism is the presence of capsular polysaccharides. They serve as the foundation for dividing pneumococci into serotypes and are also antigenic.
What makes it an organism?An object with life is referred to as an organism. The fundamental building blocks of both living beings and ou pas things are molecules. A living entity, however, can be distinguished from an abstract concept by its distinguishing traits. For instance, a cell or multiple cells make form an organism.
Do living things exist?An animal is a form of life that is capable of reproduction: The ability to duplicate oneself is one of the traits of organisms, but this trait is shared by many other biological entities as well, including cells, DNA, organelles, and even even communities.
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a plant species, such as the giant sequoia, has high mortality early in life. however, if a tree reaches a certain age, it will likely live a long life. which type of survivorship curve does this illustrate?
The type of survivorship curve illustrated by a plant species such as the giant sequoia, with high mortality early in life but a long life expectancy once a tree reaches a certain age, is known as Type I survivorship.
Type I survivorship curves are characterized by a sharp decrease in mortality early in life, followed by a relatively flat curve, indicating that the probability of death is relatively constant over the remainder of the organism's lifespan.
In the case of the giant sequoia, the high mortality early in life is due to the species’ slow growth rate and highly competitive environment. Young trees have less access to resources and need to compete with other plants for light and water. This competition, combined with the effects of drought, disease, and predation, can lead to high rates of mortality early in life.
However, if a giant sequoia is able to survive the first few years, it is likely to experience relatively low mortality over the remainder of its life. This is because the species is very long-lived, typically living for up to 3,000 years, and is also able to reach towering heights of over 300 feet. This combination of longevity and size allows the trees to reach heights that allow them to outcompete other plants for resources, providing them with a competitive advantage.
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All of the following disciplines are major contributors to the field of environmental science except?a. Linguistics and physicsb. Biology and earth sciencec. Social sciences
All of the following disciplines are major contributors to the field of environmental science except linguistics and physics.
Environmental science is a multidisciplinary field that combines knowledge from a wide range of scientific and social science disciplines to understand the interactions between humans and the natural world. Biology and earth science are both major contributors to environmental science, as they provide understanding of the processes and systems that make up the natural environment. Social sciences, including fields such as economics, sociology, and anthropology, also play an important role in environmental science, as they provide insight into the social and cultural factors that influence human interactions with the environment. Linguistics and physics, while important fields of study in their own right, are not typically considered major contributors to environmental science.
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The principle that two stimuli must differ by a constant proportion for their difference to be perceived is known as?
The principle that two stimuli must differ by a constant proportion for their difference to be perceived is known as Weber's law.
The historically significant psychological law known as Weber's law also known as Weber-Fechner law, quantifies the perception of change in a given stimulus. According to the law, the slight modification of a stimulus is a constant ratio of the initial stimulus. There is evidence that it does not hold at high levels of stimulation
The rule was first proposed in 1834 by the German physiologist Ernst Heinrich Weber to describe studies on weight lifting. Gustav Theodor Fechner, Weber's student, then extended the law to the measurement of feeling, which led to the development of the field of psychophysics. The law told Fechner that there is actually only one world, the spiritual, and that there is a relationship between the spiritual and physical realms.
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which characteristic is always true for each and every member of the animal kingdom?
The characteristic that is always true for each and every member of the animal kingdom is that it is heterotrophic. Option 1.
The animal kingdomThe animal kingdom represents one of the major kingdoms of living organisms. All the organisms in this kingdom share some basic characteristics, which include:
Heterotrophic: Animals are generally heterotrophic because they depend on external sources for their food. This is unlike organisms in the plant kingdom which have the ability to synthesize their own foods via photosynthesis.Multicellular: Animals are generally multicellular. In other words, their bodies are made up of more than one cell. Unicellular heterotrophic organisms have been classified as protozoans.Animals generally ingest their food and digestion is internal.Thus, the only characteristic that is always true to members of the animal kingdom is heterotrophic.
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which characteristic is always true for each and every member of the animal kingdom?
it is heterotrophic.
it is unicellular.
it does not have a nucleus.
it reproduces asexually.
the enormous gains in crop yields brought about by green revolution technologies may soon stop. hypothesize why.
Because green revolution technologies are lowering the quality of the soil they employ, the massive increases in food yields they have sparked may soon come to an end.
By creating high yielding kinds of important food crops, providing them with fertilizers and irrigation to speed up growth, and insecticides to lessen loss to pests, the Green Revolution significantly enhanced food production (output/acre). Through adapted practices like (1) expanding the amount of land used for farming, (2) double-cropping, which involves planting two crops instead of one each year, (3) adopting HYV seeds, and (4) significantly expanding the use of inorganic fertilizers and pesticides, the green revolution increased crop productivity.
It has been demonstrated that reducing tillage, increasing crop rotations, growing cover crops, and reintroducing livestock into agricultural production systems can both lower agriculture's own carbon footprint and absorb extra carbon produced by other industries.
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compare the second population to the parent subpopulation of generation one. how do these two populations compare? how does this copmarison difffer from your other comparison?
Once the alleles inherited from the original population are fixed, their frequencies do not change unless new alleles are introduced by mutation or gene flow.
Small populations tend to lose genetic diversity faster than large populations due to stochastic sampling errors. Gene flow is the movement of genes into and out of a population. Such movements may be due to the migration of individual organisms breeding in new populations.
Genetic drift affects the genetic makeup of populations. However, unlike natural selection, it does so through a completely random process. Although the genetic drift is an evolutionary mechanism, it has no adaptation-inducing function. Gene flow is the movement of genes into and out of a population.
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blood type in humans follows a multiple allele inheritance pattern. there are three alleles for blood type in the human population, and each person only carries two of those three alleles within their genome. one allele is inherited from the father, and the other allele is inherited from the mother. the a-type allele, ia, is codominant with the b-type allele, ib, which are both completely dominant to the recessive o-type allele, i. these alleles combine to create one of four phenotypes, type a blood (either genotype iai or iaia), type b blood (either genotype ibi or ibi), type ab blood (genotype iaib), and type o blood (genotype ii). a mother with type a blood has a son with type o blood. identify the genotype that the father must have in order to produce this child. (1 point)
The system is made up of three alleles: A, B, and O. Because A and B are both dominant in regard to O, blood group A might have the genotypes AA or AO. The genotype of blood group B might be BB or BO.
Human blood type is determined by three distinct alleles: A, B, and o. People who inherit the A allele produce A antigens. Persons who inherit B alleles produce B antigens, while people who inherit O alleles produce no antigens. The A and B alleles work together to generate type AB blood, and both are dominant over the O allele.
Multiple allele inheritance occurs when a characteristic contains three or more different alleles. An example of this is the human ABO blood type alleles/trait.
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what 3 key concepts show that the groundwater system will heat the school more efficiently
An installation of a groundwater heat pump makes up the school's heating system. The piping for acquiring environmental heat is buried roughly 1.5 metres beneath the parking lot, the schoolyard, and the open areas. The water is heated by two heat pumps to the necessary input temperature. The advantage of the school's underfloor water heating system is its extremely low input temperature. The entire system combines dependability with little energy use.
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if you could engineer an activity into dna polymerase to allow both strands to follow the replication fork, what would this additional activity be?
Pork DNA polymerase needs to be able to perform three prime or five prime replications in order for this strand to be continually made toward the replication of activity 3.25 prime replication.
What steps are involved in DNA replication?Initiation at the start of replication, unwind so reveal the threads, synthesis on both layers with multiple enzymes adding nucleotide 3′ to 5′, elongation by RNA primers, then separation to two full molecules are the five steps in the replication process of DNA.
Does the replication of DNA establish God's existence?The process of DNA replication demonstrates how this knowledge is efficiently transmitted to use a code that is specifically created to create the proteins required for life.
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serotonin is best described as group of answer choices a feel good hormone a neurotransmitter that mimics an opioid receptor a neurotransmitter a neurotransmitter that impacts gaba
Answer: A neurotransmitter that impacts GABA
Explanation: Serotonin modulates GABA. It generally enhances GABA, therfore having an inhibitory function.
which include fats, store energy that can be broken down to yield large amounts of energy.
Answer:
subcutaneous fat
suncutaneous
what enzyme catalyzes the attachment of an amino acid to trna? what enzyme catalyzes the attachment of an amino acid to trna? aminoacyl-trna synthetase rubisco dextrinase argininosuccinate lyase nuclease
Enzymes are proteins that are responsible for the catalysis of biochemical reactions. They are involved in a variety of cellular processes, including metabolism, replication, and gene expression. One of the most important enzymes in biology is aminoacyl-tRNA synthetase.
This enzyme is responsible for the attachment of an amino acid to its corresponding transfer RNA (tRNA) molecule, which is then used in the process of translation.
Aminoacyl-tRNA synthetase binds to an amino acid and its corresponding tRNA molecule and catalyzes the formation of an aminoacyl-tRNA complex. This complex is then used to initiate the translation process, in which ribosomes decode the genetic code within mRNA molecules and use the information to construct proteins. Without this enzyme, the translation process would not be possible.
Other enzymes involved in metabolism, replication, and gene expression include rubisco, dextrinase, argininosuccinate lyase, and nuclease. Rubisco is an enzyme involved in photosynthesis, which is the process by which plants use light energy to produce food. Dextrinase is a carbohydrate-degrading enzyme that breaks down complex carbohydrates into simple sugars. Argininosuccinate lyase is an enzyme involved in the production of urea, which is an important waste product of the body. Nuclease is an enzyme that cleaves DNA or RNA molecules into smaller fragments.
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What is Autonomic nervous system (sympathetic and parasympathetic division)?
The two halves of the autonomic nervous system are the sympathetic and parasympathetic nervous systems.
The two fundamental parts of the central nervous system are the spinal cord and the brain.
peripheral nervous system.
The peripheral nervous system is made up of the nerves and ganglia that are not connected to the brain and spinal cord, while the central nervous system is made up of the brain and spinal cord.
The somatic nervous system and the autonomic nervous system are also parts of the peripheral neural system.
The autonomic nervous system also includes the sympathetic and parasympathetic nervous systems. The "fight or flight" reaction is triggered by the sympathetic nervous system. The parasympathetic nerve system controls relaxing and digestive processes.
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