James Watson was awarded the Nobel Prize after discovering that DNA has a Double helix shape.
Key points:
James Watson and Francis Crick discovered the structure of DNA in the 1950s.They found that DNA has a double helix shape.The double helix is composed of two complementary strands running in opposite directions.Each strand is made up of a sugar-phosphate backbone and nitrogen-containing bases: adenine, thymine, guanine, and cytosine.The discovery provided a physical explanation for how genetic information is stored and transmitted.It allowed scientists to understand how genetic information is read and used to make proteins.The discovery is considered one of the most important scientific discoveries of the 20th century.Watson, Crick, and Wilkins received the Nobel Prize in Physiology or Medicine in 1962 for their discovery.Learn more about DNA here:
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A hormone that is to be secreted, or released, from a cell is most likely to be found in the _____.
A hormone that is to be secreted, or released, from a cell is most likely to be found in the bloodstream.
How do hormones travel throughout the body?Hormones are released into the bloodstream by endocrine glands. Six hormones are produced by cell clusters in the anterior pituitary and released into the bloodstream.
Hormones produced and released by various cell cluster types include: Adrenocorticotrophic hormone is produced by corticotrophs (ACTH), and the thyroid-stimulating hormone (TSH) is produced by Thyrotrophs.
Therefore, blood is responsible for the movement of the hormone throughout the body.
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Which technique first produced unequivocal support for the neuron doctrine of the nervous system (as opposed to the reticular theory)?a. Extracellular electrical recordingsb. EEG (electroencephalogram)c. Golgi stain (light microscopy)d. Electron microscopy of nervous tissuee. Acetylcholinesterase staining
C. Golgi stain (light microscopy) The Golgi stain (light microscopy) was the first technique that produced unequivocal support for the neuron doctrine of the nervous system.
The Golgi stain allowed researchers to visualize individual neurons in their entirety, demonstrating that they were distinct, discrete cells rather than a continuous network of cells as suggested by the nervous system theory. The Golgi stain uses a special silver impregnation technique that stains only a small proportion of neurons in a given sample, making it possible to see individual neurons in great detail. This technique provided the first clear evidence for the existence of individual neurons and was crucial in establishing the neuron doctrine as the prevailing theory of the organization of the nervous system. The Golgi stain remains an important tool for studying the anatomy of the nervous system and is still widely used in contemporary neuroscience research.
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the three foci of genetics are known as _____ genetics, _____ genetics, and _____ genetics.
The three focus of genetics are known as transmission genetics, molecular genetics, and population genetics.
Genetics is the branch of biology that studies heredity, or the phenomena through which organisms pass on their traits to their offspring. Transmission genetics is concerned with discovering the genes that influence a certain trait, as well as the patterns by which these genes are passed down from generation to generation or from cell to cell.
The structure and function of genetic units, i.e. the chemical content of genes and their expression in defining the structure of proteins, the most significant functional components of cells, are the focus of molecular genetics. Population genetics studies the pattern of gene distribution in organism populations as well as changes in population genetic organization.
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pls help me
Adelaide and Emma Rose created two brand new breeds of flowers: one lime green (GG) and one bright orange (OO). Green is codominant with orange. If they cross a lime green flower with a bright orange flower, what percentage should be both green AND orange?
What percentage of the offspring will be both orange and green
The percentage of the offspring that will be both orange and green if green in codominance is 100 percent since codominance is a type of allele interaction that produces a new non-mixed phenotype.
What is codominance genetic allele interaction?The phenomenon of codominance is a genetic allele interaction where both alleles are expressed in the same cell, thereby there is no dominant allele.
Therefore, with this data, we can see that codominance genetic allele interaction leads to the expression of both alleles for a given gene locus and a new phenotype.
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What assumptions must be met for a population to be in Hardy-Weinberg equilibrium?
For a population to be in Hardy-Weinberg equilibrium the following assumption must be met.
The population must be large. This is to insure that arbitrary lovemaking occurs and inheritable drift doesn't play a part. The population must be insulated from other populations. This is to insure that there's no gene inflow between the populations. Mutation can be absent. This is to insure that any new alleles can not be introduced into the population. Selection must be absent. This is to be just insure that genotypes with advanced fitness don't come overrepresented in the population. All individualities in the population must have the same chance of reproducing. This is to insure that there's no bias in the reproductive success of certain genotypes.To know more about Hardy-Weinberg equilibrium visit:
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(FILL IN THE BLANK) _______is a barrier separating the cell’s genetic information from the cell’s cytosol
The cytoplasm of the cell and its genetic material are divided by the nuclear envelope.
In eukaryotic cells, the nucleus and cytoplasm are separated by the nuclear envelope (NE), a tightly controlled membrane barrier. There are several diverse proteins in it that have been connected to chromatin arrangement and gene regulation. The nuclear membrane presents a problem for cell division even if it permits sophisticated degrees of gene expression. The metazoan nucleus must totally disintegrate during mitosis in order for the mitotic spindle to have access to the chromatin; this creates the requirement to reassemble the nuclear compartment at the conclusion of each cell division.
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discuss the similarities and differences between animal and bacterial virus multiplication.
The methods viruses employ to grow inside the host cell are similar in both bacterial and animal viruses. While there are distinctions in the many methods of action each process employs.
The animal virus viral protein breakdown by enzymes Synthesis In the cytoplasm, a bacteriophage. Synthesis by bacteria stopped. Formation of viral mRNA from viral DNA or RNA replication. synthetic components of viruses. Animal virus: RNA or nucleus in the cytoplasm (DNA). Synthesis of host cells stopped. replication of viral DNA or RNA, creation of viral RNA. Attachment - The bacterial virus enters the host with the aid of the tail fibers' attachment to the cell wall protein. Multiplication - Both the animal and bacterial viruses replicate inside a host cell. Animal viruses, on the other hand, get access to the host by capsid attachment to plasma membrane proteins.
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6. suppose you count 35 bacterial cells from a solution that has gone through the following serial dilutions: two 10-fold dilutions, followed by a 5-fold dilution, followed by 2-fold dilution. what should be the bacterial count from the original solution?
35000 cells/ mL be the bacterial count from the original solution
Given:
That ther are 35 cells but volume is not mentioned so let's assume 35 cells are present in 1 mL.
Total dilution factor = product of all individual dilution factors
Total dilution factor= 10×10×5×2=1000
Bacterial count in the original solution = bacterial count in diluted sample × dilution factor= 35×1000=35000 cells/ mL
What is a bacterial cell and its function?Bacteria are prokaryotes with chromosomes made up of a single closed DNA circle and no well-defined nuclei or membrane-bound organelles. They appear in a variety of forms and sizes, including minute spheres, cylinders, and spiral threads, as well as flagellated rods and filamentous chains.
Prokaryotic cells (Bacteria and Archaea) differ fundamentally from eukaryotic cells that comprise other forms of life. Prokaryotic cells are distinguished by a more simpler architecture than eukaryotic ones.
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What happens when your blood sugar rises?
Answer: lots of things
Explanation: Hyperglycemia (high blood glucose) means there is too much sugar in the blood because the body lacks enough insulin. Associated with diabetes, hyperglycemia can cause vomiting, excessive hunger and thirst, rapid heartbeat, vision problems and other symptoms. Untreated hyperglycemia can lead to serious health problems.
which of the following is a component of rna but not a component of dna
1. ribose
2. deoxyribose
3. phosphate group
4. Nitrogen bases A C T G
Answer:
RNA is a single-stranded polymer of
nucleotides. It also differs from DNA in
that it contains the sugar ribose, rather
than deoxyribose, and the nucleotide
uracil rather than thymine.
a modern understanding of the role of genes indicates that each psychological trait is influenced by how many genes?
A modern understanding of the role of genes in psychology suggests that most psychological traits are influenced by multiple genes, with the exact number varying depending on the trait in question. This is because many traits are polygenic, meaning they are influenced by the combined effects of many genes, each of which may have a small effect.
The exact number of genes that influence a specific psychological trait is not known. Psychological traits are thought to be influenced by a complex interaction of many genes, each with a small effect, as well as environmental factors. The idea that a single gene determines a psychological trait has been largely discredited and replaced with the concept of polygenic inheritance. It is estimated that many psychological traits are influenced by hundreds or thousands of genes.
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consider the first copy of an allele for insecticide resistance that arises by mutation in a population of insects exposed to an insecticide. if, after some generations, we find that most of the population is resistant and shares in this mutation, is it likely that this resistance is an adaptation?
Consider the first copy of an allele for insecticide resistance that arises by mutation in a population of insects exposed to an insecticide, the resistance we get after few generation is due to adaptation.
In biology, there are three related definitions of adaptation. First, natural selection, a dynamic evolutionary process, adapts organisms to their environments, improving their evolutionary fitness. Second, it is a state that the populace has attained throughout that process. Thirdly, it is a phenotypic trait or adaptive trait that has been preserved and has evolved through natural selection and has a functional role in each individual organism.
Most insecticides have been successfully adapted to by insects, who have developed resistance to them. This adaption, which is recent and has rapidly and independently evolved in many different species, is extremely significant from an economic and medical standpoint. Resistance is thought to be pre-adaptive and to develop through recurring mutation of pre-existing alleles, while its exact origins are yet unknown.
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which organisms do not possess defenses againstt oxidatiive damage, such as catalases and superoxide
Organisms do not possess defenses against oxidative damage, such as catalases and superoxide are Obligate anaerobes.
An organism that needs oxygen to grow is said to be an obligatory aerobe. These organisms use oxygen during cellular respiration to metabolise materials like carbohydrates or fats in order to produce energy. The electron transport chain's terminal electron acceptor in this type of respiration is oxygen. Compared to fermentation or anaerobic respiration, aerobic respiration has the advantage of producing more energy (adenosine triphosphate, or ATP), but obligate aerobes are vulnerable to high levels of oxidative stress.
Oxidative stress is a result of an imbalance between a biological system's capacity to quickly detoxify reactive intermediates or repair the harm they have caused and the systemic manifestation of reactive oxygen species.
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which is a function of the plasma membrane? which is a function of the plasma membrane? regulate transport of dna in and out of the nucleus regulate production of lipids in the cell regulate production of proteins in the cell regulate traffic of chemicals in and out of the cell
The plasma membrane protects the cell from its outside environment. It mediates cellular transport and transmits cellular signals.
The plasma membrane provides protection for a cell. It protects the cell by acting as a barrier that separates the interior of all cells from the outside environment. The plasma membrane provides a fixed environment inside the cell.
Plasma membranes are selectively permeable, meaning that only certain molecules can pass through them.
The plasma membrane transports nutrients into the cell and also transports toxic substances out of the cell. Hence, regulates the transport of substances in and out of the cell.
The plasma membrane receives chemical messengers from another cell as it facilitates communication and signaling between cells. It does it through various proteins and carbohydrates in the membrane. Hence, it also acts as a receptor.
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wha is enzyme that adds nucleotides to exposed nitrogen bases
DNA Polymerase is the enzyme that adds nucleotides to exposed nitrogen bases. The polymerase builds a new DNA strand on top of the existing one in this manner.
DNA polymerase wraps itself around a single unwound polynucleotide strand once the primer is present and attaches new nucleotides to the exposed nitrogenous bases.
Nucleotides are shown in a schematic in two rows. Each nucleotide is depicted as a long, colored, vertical rectangle (a nitrogenous base) attached at one end to a gray, horizontal cylinder (a sugar molecule). A and T form a pair, while C and G form a pair, and each nitrogenous base binds only to its partner. An affinity exists between each nucleotide and its partner. As DNA polymerase moves down the unwound DNA strand, it relies on the pool of free-floating nucleotides surrounding the existing strand to construct the new strand. A pairs with T, and C pairs with G.
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What is the network of lymphatic vessels?
how many bones joints and muscles does a human foot have
Answer:
33 joints, 26 bones, and more than a hundred muscles
That's how many bones joints and muscles a human foot have
choose all the reasons why is it important for conducting arteries to maintain elasticity.
It is important for conducting arteries to maintain elasticity because their recoil helps maintain blood pressure between heartbeats, their expansion reduces systolic stress on smaller arteries, and their expansion and recoil helps keep the blood flowing during diastole.
Blood flow control in the body is greatly influenced by the vasculature. Blood pressure typically drops from arteries to veins as a result of the pressure overpowering the vessels' resistance. The loss of pressure at any given place in the vasculature is inversely correlated with the magnitude of the change in resistance. Blood pressure (BP), which aids in the movement of blood through the body, is the force that blood applies to the walls of blood vessels. The amount of pressure that blood places on arteries while the heart is pumping is measured by systolic blood pressure. Systolic blood pressure should be 120 mmHg or less. The pressure in the blood arteries between heartbeats is measured by diastolic blood pressure. 80 mmHg is the ideal diastolic blood pressure.
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The complete question is:
Select all that apply. Why is it important for conducting arteries to maintain elasticity?
Their recoil helps maintain blood pressure between heartbeats.
Their expansion reduces systolic stress on smaller arteries.
Their expansion and recoil helps keep the blood flowing during diastole.
Their recoil ensures that blood pressure is higher during diastolic than during systole.
A bacterium that only possesses the ability to fermentobtains energy A) by aerobie respiration only B) only in thepresence of oxygen only in the absence
B) only in the presence of oxygen. Fermentation is a metabolic process that occurs in the absence of oxygen and allows bacteria to obtain energy by breaking down sugars or other organic compounds. In contrast, aerobic respiration requires oxygen and produces more energy than fermentation, but some bacteria are not able to perform it.
Bacteria that only have the ability to ferment obtain energy by this process and are called anaerobic bacteria. They are adapted to grow in environments where oxygen is not available, such as in soil, water, or in the gut of animals. Fermentation is a metabolic process that allows microorganisms such as yeast and bacteria to produce energy by breaking down sugars or other organic compounds in the absence of oxygen. This process produces alcohol, lactic acid, and other by-products, depending on the type of microorganism and the substrate being used. Fermentation is used in many food and beverage production processes, such as the production of bread, beer, and cheese. It is also used in the production of biofuels, such as ethanol, and in the generation of industrial chemicals.
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what part of photosynthesis involves an electron transport chain?
you use onpg to assay b-galactosidase activity in two e. coli cultures. od420 values indicate similar concentrations of b-galactosidase in both cultures. you do not measure od600. you can conclude that:
Based on the OD420 values indicating similar concentrations of b-galactosidase in both cultures, you can conclude that the b-galactosidase activity is similar in both E. coli cultures.
The enzyme -galactosidase activity in a culture is determined using the ONPG (o-nitrophenyl-D-galactopyranoside) assay. The test is based on the transformation of the substrate ONPG into o-nitrophenol, a yellow product that absorbs light at 420 nm. The amount of product produced is inversely related to the level of -galactosidase activity in the sample. The concentration of b-galactosidase in the sample can be calculated using the OD420 values obtained from the test.
In this instance, the OD420 values show comparable b-galactosidase concentrations in both E. coli cultures, indicating that this enzyme's activity is comparable in both cultures. However, measuring OD420 does not reveal the rate of development or general wellbeing of the cultures; it simply reveals the activity of b-galactosidase.
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Recent research has led to the development of solar-powered vehicles. Solar vehicles use panels that collect sun rays that are then converted to electricity by photovoltaic cells. The electricity is stored in a battery that runs the car.Which is the MOST likely reason for developing this type of transportation technology?
The most likely reason for developing this type of transportation technology Energy from solar cars is non-exhaustible.
Solar energy is used to generate electricity for solar cars. The solar panels are attached to the vehicle's surface, typically it's top. Solar energy is converted directly into electrical energy by photovoltaic (PV) cells. Material made of semiconductors makes up the PV cell; The term "semi" refers to its ability to conduct electricity more effectively than an insulator, but not as effective as a metal. PV cells make use of a variety of different semiconductor materials. There are many great advantages to using solar energy to power cars:
Fossil fuels, a scarce resource, will be used less when solar energy is used.Solar power costs nothing.Solar power does not pollute the environment.There will never be enough solar power.Know more about PV cell here: https://brainly.com/question/82317
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the class of neurotransmitters called neuropeptides include which neurotransmitter(s)?
The class of neurotransmitters called neuropeptides include which neurotransmitter(s) is Enkephalins and substance P
Numerous peptide molecules that function as neurotransmitters in the nervous system are members of the class of neurotransmitters known as neuropeptides. A few instances of neuropeptides are as follows:
Substance P
Oxytocin
Vasopressin
Enkephalins
Dynorphins
Endorphins
Ghrelin
The perception of pain, the control of the autonomic nervous system, and the regulation of mood and behaviour are just a few of the physiological processes in which these neuropeptides are crucial players. To control intricate brain processes, they frequently cooperate with more established neurotransmitters like dopamine, serotonin, and norepinephrine.
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The class of neurotransmitters called neuropeptides include which neurotransmitter(s)?:
A. Dopamine and serotonin
B. Enkephalins and substance P
C. Acetylcholine
D. Norepinephrine
what does the blending inheritance theory state and how is this different from preformationism? offspring develop from a miniature adult form, or homunculus, that already exists in the sperm or egg. offspring inherit discrete genetic information from both parents that manifests as a trait according to defined principles. genetic information travels from different body parts to the reproductive organs. offspring inherit all traits from one parent. the egg and sperm contain genetic material that mixes upon conception to produce an intermediate phenotype in the offspring.
Blending inheritance theory states that offspring inherit traits from both parents that blend together to form a new phenotype. (option 2).
Preformationism, on the other hand, posits that offspring develop from a miniature adult form (homunculus) that already exists in the sperm or egg. These theories differ in their explanation of how genetic information is passed from one generation to the next and how traits are produced in offspring.
This theory was later discredited and replaced by the theory of epigenesis, which states that offspring develop from a combination of genetic and environmental influences and that development occurs gradually over time.
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Complete Question:
what does the blending inheritance theory state and how is this different from preformationism?
1. offspring develop from a miniature adult form, or homunculus, that already exists in the sperm or egg.
2. offspring inherit discrete genetic information from both parents that manifests as a trait according to defined principles.
3. genetic information travels from different body parts to the reproductive organs.
4. offspring inherit all traits from one parent.
5. the egg and sperm contain genetic material that mixes upon conception to produce an intermediate phenotype in the offspring.
the kidneys are fully enclosed by the ribs for protection/ True or False, explain
False. The kidneys are not fully enclosed by the ribs for protection. The kidneys are located in the abdomen, not the thorax, and are partially covered by the ribcage.
The right kidney is located slightly lower than the left kidney, and both are situated just below the diaphragm, the muscle that separates the thorax from the abdomen. The lower part of each kidney is covered by a layer of fat, which helps to protect it, but the ribcage does not fully enclose the kidneys.
Instead, the ribs provide some indirect protection to the kidneys by helping to protect the lower back and spine, which is where the spinal column is located. This helps to prevent injury to the kidneys in case of a fall or other traumatic event.
However, it is not the primary role of the ribcage to protect the kidneys, and the kidneys are not fully enclosed by the ribs. The main function of the ribs is to protect the lungs, heart, and other important organs in the thorax.
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Write three or more questions that you still have about an organism's genotype, phenotype, and/or alleles. Your questions should be ones that can be researched or tested through investigations. Avoid asking questions that lead to yes and no answers. Then, cite specific statements, quotations, or data in the Article and the Dig Deeper that motivated you to ask each of your questions
Three more questions that I still have about an organism's genotype, phenotype, and/or alleles are:
How do changes in the environment impact an organism's phenotype expression?How does gene expression regulation influence an organism's phenotype?Can the same genotype produce different phenotypes in different environments?How does genetic drift impact the frequency of alleles in a population over time?The article and the Dig Deeper are not properly informed; hence, it is difficult to cite specific statements, quotations, or data in both of them.
An organism's genotype refers to its genetic makeup, including the specific sequences of its DNA that encode for specific traits. An organism's phenotype refers to its observable characteristics and traits, which can be influenced by both its genotype and the environment. Alleles are alternative forms of a gene that can lead to variations in an organism's phenotype.
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dna repair mechanisms can help alleviate the effects of
DNA damage. DNA repair mechanisms are processes that cells use to fix or repair any damage or errors in the DNA molecule. The DNA damage can be caused by various factors, such as exposure to ionizing radiation, chemical mutagens, and normal cellular metabolic processes. If the DNA damage is not repaired, it can lead to mutations, genomic instability, and cell death. DNA repair mechanisms play a crucial role in maintaining the integrity of the genetic material and preventing diseases such as cancer and aging.
Base Excision Repair (BER): This mechanism repairs damaged bases in the DNA molecule by removing them and replacing them with the correct base, Nucleotide Excision Repair (NER): This mechanism removes large sections of damaged DNA and replaces them with new nucleotides, Double-Strand Break Repair: This mechanism repairs double-stranded breaks in the DNA molecule, which can be caused by exposure to ionizing radiation or other sources of DNA damage. Mismatch Repair: This mechanism corrects errors that occur during DNA replication, where a wrong nucleotide is incorporated into the DNA strand. Overall, DNA repair mechanisms help to maintain the integrity of the genetic material and prevent the harmful effects of DNA damage.
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Which of the following best describes dehydration synthesis? View Available Hint(s) O A large molecule is broken down, or splits, to produce salt and water. O Two smaller molecules join together after a water molecule is added to split them apart. Two smaller molecules separate and reorganize into two new molecules after a water molecule is added to them. O Two smaller molecules join together after a water molecule is removed from between them.
Two smaller molecules join together after a water molecule is removed from between them is the correct statement.so, option (d) is correct.
What is molecules?
A molecule is defined as a collection of two or more chemically linked atoms of the same or distinct elements. For instance, one molecule of water is created when two hydrogen atoms and one oxygen atom combine to make one.
What is dehydration ?
A disorder that develops when the body loses excessive amounts of fluids, including water, that are necessary for normal function. Dehydration can also result from taking certain medications, not getting enough fluids in, excessive perspiration, a fever, excessive urination, or severe diarrhea and vomiting. Dehydration is typically brought on by these conditions.
During dehydration synthesis, two molecules synthesize together and water molecules are released or eliminated. Here a larger compound is formed and water is removed (losing water).
Option (A) is wrong because a large molecule is not broken down in dehydration synthesis rather two small molecules are joined together.
Option (B) is wrong because water molecules are released rather than being added in dehydration synthesis.
Option (C) is wrong because in dehydration synthesis two molecules does not separate and reorganize into two new molecules rather two small molecules join together. Water molecules are released and not added to them.
Therefore, smaller molecules join together after a water molecule is removed from between them is the correct statement.so, option (d) is correct.
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TRUE/FALSE. because they connect to all spinal nerves, the rami communicantes allow sympathetic information originating from the thoracolumbar region to be dispersed throughout the body.
This is true that the rami communicantes enable sympathetic information coming from the thoracolumbar region to be distributed throughout the body because they connect to all spinal nerves.
Spinal nerves are assorted nerves that communicate straightforwardly accompanying the sleep-inducing or numbing drug cord to harmonize engine and sensual facts from the body's outskirts. Each nerve forms from nerve fibers, famous as fila radicular, reaching from the posterior (back) and anterior (first) ancestries of the spinal cord.
Think of the spinal nerve as the body of a wood - complete ramus resources branch in Latin, so the basic rami are the arms of a sleep-inducer nerve, inasmuch as the roots combine to form the sleep-inducing or numbing drug nerve. These agreements are very smooth to confuse. The basic rami are assorted extreme anxiety winning both engine and auditory fibers.
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Which of these foods is actually a fruit in plant biology?
Onion
Pepper
Mushrooms
All of the above
Pepper is actually a fruit in plant biology.
The flowering plant known as black pepper (Piper nigrum), which belongs to the Piperaceae family, is grown for its peppercorn-shaped fruit, which is often dried and used as a spice and condiment. The fruit is a drupe (stonefruit), and it is dark red, about 5 mm (0.20 in) in diameter when it is fresh and fully grown, and it has a stone within that carries a single pepper seed. Simply called pepper, peppercorns and the ground pepper made from them can also be more specifically referred to as black pepper (cooked and dried unripe fruit), green pepper (dried unripe fruit), or white pepper (ripe fruit seeds). The Malabar pepper is widely grown there and in other tropical areas. Black pepper is a native of India's Malabar Coast.
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