Answer:
choroid plexuses
Explanation:
Cerebrospinal fluid is formed by capillary knots called choroid plexuses, which hang into the ventricles of the brain.
non-coding
regulatory region
Which three questions should the scientists investigate in order to better understand the reason that some stickleback fish have pelvic spines and some do not?
O
How does the non-coding regulatory region affect Pib1?
Are there differences between the Pitx1 gene in fish with and without pelvic spines?
How did the scientists figure out that Pitx1 is related to the development of pelvic spines in stickleback fish?
Are there differences between the non-coding regulatory region in fish with and without pelvic spines?
Pelvic spines provide stickleback fish with a defense against such predators
Why do some sticklebacks lack pelvic spines?Some stickleback populations lack pelvic spines as a protective adaptation. There are some predators that can grab sticklebacks by their pelvic spines. Not having a pelvic spine makes it more difficult for predators to grad and eat sticklebacks."But other predators like dragonfly larvae can grab sticklebacks by the spines, reel them in and eat them. They wait for sticklebacks to swim by and grab them." So some lake stickleback populations evolved without pelvises and pelvic spines because those without pelvic spines were more likely to surviveSince the first generation of stickleback fish must have a heterozygous genotype (Ff) [bred between pure-breeding pelvic spine fish and pure- breeding no pelvic spine fish], this indicates that the “grow-a-pelvic-spine-allele” is dominant.To learn more about sticklebacks lack pelvic spines refers to:
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compare and contrast spontaneous generation and biogenesis
According to the notion of spontaneous generation, life can emerge from inanimate objects, as evidenced by the existence of creatures in seemingly sterile conditions. The idea of biogenesis holds that all live things evolved from other living things.
Spontaneous Generatiion The existence of animals in seemingly sterile environments is evidence that life can develop spontaneously from inanimate substances, according to the theory of spontaneous generation. According to the biogenesis theory, all living things descended from earlier living things. This is different from abiogenesis and spontaneous generation.Supporters of spontaneous generation included Francesco Redi, Harold Urey, Stanley Miller, and Alexander Oparin. Spontaneous generation is also known as Aristotelian abiogenesis because of the ancient Greek proponent. The idea of spontaneous generation was influenced by the stealth and invisibility of some species, including rats, bees, and bacteria.According to the theory of spontaneous genesis, non-living molecules were the source of life on Earth.Science has not established spontaneous generation.Observations and logical thinking serve as the foundation for spontaneous generation.BiogenesisThe idea of biogenesis holds that all live things evolved from other living things. This differs between spontaneous generation and abiogenesis.Supporters of biogenesis included William Harvey, Theodore Schwann, Lazzaro Spallanzani, John Needham, and Louis Pasteur. Lazzaro Spallanzani was the first to dispute spontaneous generation. In 1767, he provided evidence that boiling can kill bacteria. He cooked the beef in a tightly closed jar, and the broth afterwards revealed no evidence of bacterial growth. Louis Pasteur refuted spontaneous generation in 1864 with a series of tests that were similar to Spallanzani's.Biogenesis holds that life on Earth evolved from earlier living organisms.Science has demonstrated biogenesis.The foundation of Biogenesis is actual research and empirical data.To know more about Spontaneous generation and biogenesis refer to:
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portion of the autonomic nervous system that arises from the brain and spinal cord, it is called ____
Portion of the autonomic nervous system that arises from the brain and spinal cord, it is called peripheral nervous system
The nerves that branch out from the brain and spinal cord comprise the peripheral nervous system. These nerves serve as a link between the CNS and the rest of the body. The somatic nervous system and the autonomic nervous system are subsets of the peripheral nervous system.
What are the three main components of the peripheral nervous system?Parts of the nervous system outside of the brain and spinal cord are referred to as the peripheral nervous system. The cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions are all included.
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In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but they won't ever be carriers) H X X H xixi = female, normal = female, carrier = female, hemophiliac XHY Xh Y = male, normal O 100% of their children will have the disease = male, hemophiliac If a woman who is a carrier has children with a man who does not have the disease, which of the following demostrates the correct probabilities of the children being carriers or having the condition? O 0% of the males will have the disease, 50% of the females will have the disease O 100% of the males will have the disease, 100% of the females will be carriers O 50% of the males will have the disease, 50% of the females will be carriers
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patterns of inheritance problems monohybrid crosses
In a monohybrid cross, an organism is crossed for a single trait that is controlled by one gene. The genes for this trait can exist in different variations, known as alleles.
For example, in a monohybrid cross involving the gene for seed color in pea plants, the dominant allele (T) codes for tall plants, and the recessive allele (t) codes for short plants. A monohybrid cross between a tall plant (TT) and a short plant (tt) would result in all tall plants (Tt) in the first generation (F1). this is an illustration of Mendel's Law Of Dominance. Monohybrid crosses can also be used to understand Mendel's Law of Segregation, which states that the two alleles for a trait segregate (separate) during the formation of gametes and randomly come together during fertilization.
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What is the process called where the infected cell bursts open and releases the virus?
Answer: The process where an infected cell bursts open and releases virus particles is called lysis.
Explanation:
Cell bursting, also known as lysis, produces hundreds of new phages that can infect additional host cells nearby. The steps of the lytic cycle are as follows: Attachment: Proteins in the phage's "tail" attached to a particular receptor (in this example, a sugar transporter) on the bacterial cell's surface.
During which stage of Prophase I, does the crossing over takes place ?
A. Homologous chromosomes
B. Sister chromatids
C. Cross overs
D. Parental chromosomes
During Homologous chromosomes stage of Prophase I, does the crossing over takes place. In essence, prophase 1 is the recombination and crossing over of genetic material between non-sister chromatids.
The same genes are present along the chromosomal arms of homologous chromosomes in the same order. A homologous chromosome's length of chromosomal arms and centromere location are its two primary characteristics. In order to align properly, the actual arm length must match the positions of the genes. Four major configurations—metacentric, submetacentric, acrocentric, or telocentric—can be used to describe centromere positioning on a chromosome. The main causes of structural homology between chromosomes are both of these characteristics, i.e., the distance between centromeres and the length of chromosomal arms. Consequently, when two chromosomes with a similar structural make-up exist.
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Explain : The chloroplast in corn plant appears under the light microscope as a convex lens
Under a light microscope, corn plant chloroplasts can be seen as convex lenses. This is due to their double membrane surrounding a stroma, which contains various organelles including thylakoids, granum, and more.
The curved, dome-like shape of the chloroplasts is created by the thylakoids, which are arranged in a way that allows the plant to absorb light in order to photosynthesize.
The pigments within the chloroplasts give them their green color, which can be seen under a microscope. The convex lens-like shape of the chloroplasts is essential for the plant to convert light energy into chemical energy and carry out photosynthesis.
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do you think this type of genetic testing should be available? what are the advantages and disadvantages of knowing what is in your genes?
Genetic testing can be a valuable tool for understanding a person's risk for certain diseases and can help people make informed decisions about their health.
Genetic testing can be beneficial for early detection and prevention of inherited diseases, for identifying genetic conditions that may affect a pregnancy and for guiding treatment options for certain diseases. Genetic testing can be difficult to interpret, and they can raise ethical, legal, and social issues. Genetic testing can also have emotional and psychological effects, such as anxiety, depression, or guilt. Genetic testing can be a useful tool, but it is important to consider the potential risks , diseases and benefits before making a decision to undergo testing.
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nutrients absorbed into tiny capillaries and lymph vessels in walls.
Digestive nutrients are taken up by the lymphatic and tiny capillary walls.
In the heart of each villus are lacteals, specialized lymph capillaries that are blood capillaries. The majority of nutrients are absorbed via blood capillaries, while lacteals are responsible for absorbing lipids and fat-soluble vitamins. Because it contains a lot of fat, the lymph in lacteals is called chyle and has a milky appearance.
The fat-soluble vitamins A, D, E, and K are among them. These vitamins do not dissolve in water. After being absorbed, these vitamins are transported into circulation by the lymphatic capillaries themselves.
They also have lacteals, which are lymph capillaries, and blood capillaries. Fatty acids and glycerol are absorbed into lacteal lymph whereas glucose, fructose, galactose, and amino acids are taken into the blood.
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what strructures can be seen during the interphase
Answer:
The nuclear envelope surrounds the nucleus.
Explanation:
The stuff around the nucleoil contained within the envelope is DNA. I see that u are new. Welcome to brainly.
hundreds of species of insects, fungi, bacteria, viruses, and plants have evolved resistance to a wide variety of insecticides, fungicides, antibiotics, antiviral drugs, and herbicides. how have humans affected the evolution of these species?
Hundreds of species of insects, fungi, bacteria, viruses, and plants have evolved resistance to a wide variety of insecticides, fungicides, antibiotics, antiviral drugs, and herbicides.
This can be due to the following reasons:
MutationsBetter health practicesNo new species are evolving therefore the old ones are evolving by natural selection.They are becoming resistant.Now by considering the fact that if different species of insects, fungi, bacteria, viruses evolves and becomes resistant to various insecticides, fungicides, as well as antibiotics as we are using repeatedly against them then it will not work against them. Therefore those species of insects, fungi, bacteria, viruses will be harmful to the humans like before. Therefore we need to develop newer insecticides, fungicides, antibiotics, antiviral drugs, and herbicides after using for a certain span of time of using it and we should not use them unnecessarily.
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A scientist is developing a computer model to determine the maximum population size, or
Choose...
, of eagles and other birds of prey in a forest ecosystem. The model should represent all of the
Choose...
that affect the populations.
To determine the maximum population size or choice of eagles and other birds of prey in a forest ecosystem, the model should represent carrying capacity, and limiting factors.
How do limiting factors affect carrying capacity?Every ecosystem has limiting elements that prevent populations from growing out of control, such as the availability of food or the effects of illness and predation.
The carrying capacity of an ecosystem, or the largest population that an ecosystem can sustain given all of its resources, is determined by several limiting constraints.
Therefore, the model represents carrying capacity.
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which is one of the primary goals of the human genome project
The human genome project's major objective is to discover the 20,000 to 25,000 genes that form the human genome.
What is THE HUMAN GENOME PROJECT?
HGP is a scientific research project that successfully sequenced the whole human genome of 3.3 billion base pairs in 2003.
The following are the particular aims of the human genome project:
Analysis of data optimization.The complete genome is being sequenced.The full human genome has been identified.To hold the data, genomic sequence databases are being created.Taking care of any legal, ethical, or societal difficulties that may arise as a result of the projectAs a result, the human genome project's major objective is to discover the 20,000 to 25,000 genes that form the human genome.
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What is the polysaccharide that is found in plant and functions as structural support?
Polysaccharide which is found in plant and functions as structural support is cellulose.
Cellulose is a natural compound with the equation (C₆H₁₂O₆) , a polysaccharide comprising of a straight chain of a few hundred to a large number of β(1→4) connected D-glucose units.Cellulose is a significant underlying part of the essential cell mass of green plants, many types of green growth and the oomycetes. A few types of microorganisms discharge it to shape biofilms.Cellulose is the most plentiful natural polymer on Earth.The cellulose content of cotton fiber is 90%, that of wood is 40-half, and that of dried hemp is roughly 57%.
Cellulose is mostly used to deliver paperboard and paper. More modest amounts are changed over into a wide assortment of subsidiary items like cellophane and rayon. Change of cellulose from energy crops into biofuels, for example, cellulosic ethanol is being worked on as an inexhaustible fuel source. Cellulose for modern use is essentially acquired from wood mash and cotton.
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how long does it take for an unburied body to decompose to a skeleton
In a temperate environment, it typically takes three weeks to several years for a corpse to disintegrate into a skeleton, depending on circumstances such as temperature, humidity, the presence of insects, and submersion in a substrate like as water.
Skeletonization refers to the condition of a deceased organism following decomposition. Skeletonization is the last stage of decomposition in which the soft tissues of a corpse or carcass have deteriorated or dried to the point that the skeleton can be seen. All soft tissue will have been removed by the conclusion of the skeletonization process, leaving just disarticulated bones.
In a temperate environment, it typically takes three weeks to several years for a corpse to disintegrate fully into a skeleton, depending on circumstances such as temperature, humidity, the presence of insects, and submersion in a substrate like as water.
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Which example is an abiotic factor of a desert environment?
Answer:
Lots Of Sunlight
Explanation:
Sunlight is the biggest source of energy on our planet which makes it a very important abiotic factor. Sunlight is needed for photosynthesis where a plant would make food by converting carbon dioxide and water to oxygen
Answer:
Temperature
Explanation:
Abiotic factors are non-living components of an ecosystem that shape the living organisms and their interactions within the environment. They include things like temperature, light, water, soil, and air. In a desert environment, temperature is one of the key abiotic factors. Deserts are known for their extreme temperatures, with hot days and cold nights. This high temperature can be a limiting factor for the survival of the organisms that live in these regions.
studocu which unknown(s) contained a lipid? which unknown(s) contained starch? draw the chemical structure of a carbohydrate and a lipid of your choice. name the structures you draw. why was water used as a negative control in the experiments in this lab?
1. Arachidonic acid, Oleic acid, Linoleic acid, and Palmitoleic acid are a few of the molecules that contain a lipid.
2. Rice, wheat, and maize are examples of substances that contain starch.
3. Cellulose makes up a carbohydrate.
For the majority of bodily metabolic functions, glucose, a type of carbohydrate, serves as the primary energy source. Lipids are a key source of energy and offer critical fatty acids for brain development. The non-nitrogen energy in parenteral nutrition is provided by lipids and carbohydrates together (PN).
Carbs and lipids vary primarily in that lipids are not water soluble while carbohydrates are. Both lipids and carbohydrates have the capacity to store energy, but only carbohydrates have the ability to form polymers due to their greater water solubility.
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the portions of the nervous system outside the central nervous system is called
The portions of the nervous system outside the central nervous system is called peripheral nervous system
The peripheral nervous system (PNS) is one of two components of bilateral animals' nervous systems, the other being the central nervous system (CNS). The PNS is made up of nerves and ganglia that are located outside of the brain and spinal cord. The PNS's primary role is to connect the CNS to the limbs and organs, acting as a relay between the brain and spinal cord and the rest of the body.
The PNS, unlike the CNS, is neither protected by the spinal column and skull, nor by the blood-brain barrier, leaving it vulnerable to toxins.
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What are the 3 types of variation that take place during meiosis?
Each cell division cycle results in the production of four daughter cells. The daughter cells are identical in shape and size to the mother cell but differ in chromosomal number. The daughter cells are haploid in nature.
Meiosis involves recombination and segregation. Meiosis also causes genetic variation through the recombination process. This variety is boosted further when two gametes combine during fertilization, resulting in offspring with unique DNA combinations.
We are left with four haploid cells; each one genetically different from each other and the parent cell.
Variation in Genetics
Passing through (in prophase I)A haphazard collection of chromosomes (in metaphase I)Fusion of gametes from various parents at random.Learn more about to Meiosis
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The contraction of the heart follows which sequence? The right atrium, right ventricle, left atrium, then left ventricle The left atrium, left ventricle, right atrium, then right ventricle Both atria contract together, then both ventricles contract together All four chambers contract at the same time.
The cardiac cycle begins with atrial systole and continues through ventricular systole, atrial diastole, and ventricular diastole before restarting.
The SA node starts the process, which causes the atrial muscles to contract. Doctors occasionally refer to it as the anatomical pacemaker because of this. Before the signal causes the ventricles to contract, it first travels through the Purkinje fibres, the bundle of HIS, the bundle branches, and the AV node. Analysis shows that the right and left ventricles move immediately, followed by the septum and apex of the heart being mechanically moved. These findings open the door for more extensive research and are in line with the concept that the helical myocardium is activated.
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Explain one way how the excretory system works together with the respiratory system to maintain homeostasis when your muscles are experiencing fatigue/tiredness? Explain.
DO NOT JUST DESCRIBE THEIR INDIVIDUAL JOBS.
By controlling blood volume and composition, the urinary system supports homeostasis.
What systems work with the excretory system to maintain homeostasis?To support the endocrine system in sustaining homeostasis, the excretory system collaborates with it. In accordance with the amounts of salt and water in the body, hormones act as chemical messengers to tell the kidneys whether to filter more or less of the two substances. The water content of your blood, for instance, may decrease when you perspire a lot.Other organs participate in the excretory function even though the urinary system plays a significant role. Some waste materials, including carbon dioxide and water, are expelled from the respiratory system by the lungs. In addition to the kidneys, the skin also functions as an excretory organ by removing wastes from the body through sweat.Gas exchange and blood pH control are two ways that the respiratory system keeps homeostasis in check.To learn more about blood refer to:
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what can a dna microarray teach us about oncogenes and tumor suppressor genes?
DNA microarray technology is a powerful tool that can be used to study the genetic changes that occur in cancer cells.
It allows for the simultaneous analysis of the expression levels of thousands of genes in a single sample.
With respect to oncogenes and tumor suppressor genes, DNA microarrays can provide information about which of these genes are overexpressed or underexpressed in cancer cells compared to normal cells.
Oncogenes are genes that have the potential to cause cancer when they are activated (turned on) inappropriately. DNA microarray analysis can identify which oncogenes are overexpressed in particular cancer and this information can be used to develop targeted therapies that block the activity of these oncogenes.
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what body system provides active defense against pathogens
The immune system protects your kid's frame from outdoor invaders. These encompass germs which include bacteria, viruses, and fungi, and toxins (chemical substances made through microbes).
The immune system is made up of various organs, cells, and proteins that paintings together. The immune gadget has a essential role: It protects your frame from dangerous substances, germs and cell modifications that would make you ill. It is made from numerous organs, cells and proteins. The immune system may be activated through plenty of various things that the body doesn’t understand as its own. These are referred to as antigens. Examples of antigens encompass the proteins at the surfaces of bacteria, fungi and viruses.
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what does transcription allow a cell to do and why is this important?
Transcription factors enable cells to conduct logic operations and incorporate information from multiple sources to "decide" whether to express a gene.
Introduction to transcriptionBecause a single mRNA molecule can produce several proteins, RNA transcription is an effective control point. Transcript processing provides an additional degree of control for eukaryotes, which is enabled by the presence of a nucleus.The process by which a cell creates an RNA copy of a portion of DNA in biology. This RNA copy, known as messenger RNA (mRNA), conveys the genetic information required for a cell to produce proteins. It transports information from the nucleus of the cell's DNA to the cytoplasm, where proteins are produced.For more information on transcription kindly visit to
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If the mass population is growing at 1.5% per year, how many years will it take for the population to double in size?
Explanation:
The formula to determine the time it takes for a population to double in size is given by:
T = 70 / r
where T is the time in years, and r is the growth rate as a decimal.
Given a growth rate of 1.5%, we can convert it to a decimal by dividing by 100:
r = 1.5 / 100 = 0.015
Now we can use the formula to calculate the time it takes for the population to double:
T = 70 / 0.015 = 4667 years
So it would take approximately 4667 years for a population growing at 1.5% per year to double in size.
When you lift an object, you're using ____ energy that was stored in your body. A Mechanical B Chemical C Thermal D Electrical
Chemical Energy, Option B You use chemical energy that was stored in your body when you raise an object. Your muscles flex as you lift something, using molecules stored energy.
When bonds between atoms and molecules are broken, chemical energy that has been stored in those bonds is released. To fuel movement, adenosine triphosphate (ATP) is used. Lifting the thing requires the conversion of chemical energy held in the ATP molecules into mechanical energy. When bonds between atoms and molecules are broken, chemical energy that has been stored in those bonds is released. To raise an item, chemical energy that has been stored in the form of ATP must be converted into mechanical energy.
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convert food into energy. they are found in plant and animal cells
Mitochondria convert food into energy through the process of cellular respiration.
In both plant and animal cells, the energy produced by the mitochondria is used to power various cellular processes such as protein synthesis, transport, and movement. Mitochondria are commonly known as the "powerhouses" of the cell, as they are responsible for generating the majority of the cell's ATP, which is the primary energy currency of cells.
By using the energy created during the oxidation of the food we eat, oxidative phosphorylation—the traditional function of mitochondria—generates ATP. Most biochemical and physiological processes, including growth, mobility, and equilibrium, all require ATP as their principal energy source.
The blank is the mitochondria.
The complete question is:-
The *blank* converts food into energy. It is found in both plant cells and animal cells.
what is the *blank*?
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What structural features differentiate polysaccharides from polypeptides and nucleic acids?
Polysaccharides are molecules formed of sugar monomers such as glucose, galactose, fructose, and so on, whereas polypeptides are molecules built of amino acids, and these amino acids are of 20 various sorts.
Nucleic acids are biopolymers, or macromolecules, that are necessary for all known forms of life. Nucleotides are monomers made up of three components: a 5-carbon sugar, a phosphate group, and a nitrogenous base. Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the two primary types of nucleic acids (RNA). The polymer is RNA if the sugar is ribose; DNA if the sugar is the ribose derivative deoxyribose.
Nucleic acids are naturally occurring chemical substances that function as the principal information-carrying molecules in organisms and comprise the genetic material.
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In cattle, if a red animal is crossed with a white one, a mixture of red and white color, called roan, is produced in the F1 generation. Crosses between animals in the F1 generation produce white, roan, and red cattle. Describe the pattern of inheritance in these types of cattle
The pattern of inheritance in these types of cattle is codominance. So, in cattle, if a red animal is crossed with a white one, a mixture of red and white color, called roan, is produced in the F1 generation. Crosses which are in between animals in the F1 generation will produce white, roan, and red cattle.
Codominance, in which allelic products co-exist in the phenotypic, contrasts with incomplete dominance, in which the quantitative interaction of allele products results in an intermediate phenotype. For instance, the offspring of a red homozygous flower and a white homozygous flower will include co-dominant red and white dots. When plants from the F1 generation are self-pollinated, the phenotypic and genotypic ratio of the F2 generation will be 1:2:1. (Red:Spotted:White). The ratios are the same when partial domination is present. Once again, this idiom is untrue; in fact, such circumstances shouldn't even be seen as exhibiting dominance.
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