DNA replication is not possible in the banana plant's cells, which prevents cell division and restricts growth.
Successful seed germination is extremely rare in triploids because they rarely produce eggs or sperm with a balanced set of chromosomes.
Most sterile plants don't produce any fruits, and triploid bananas are sterile. The banana fruit, which is the mammalian equivalent of a placenta without fertilisation or an embryo, is produced without any seeds, however. Bananas are sterile and seedless, like other odd polyploids (with three sets of chromosomes), because one set of chromosomes (A or B) lacks a homologous set to pair with during synapsis of meiosis. Because of this, meiosis is disrupted, and no viable gametes (sex cells) are produced.
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which fact(s) below did you include in your explanation? the thing is currently living. it is not living now, but it was living in the past. it has all five characteristics of life: it has cells, uses energy, reproduces, responds to stimuli, and grows and develops.
The fact that the thing is currently living, it is not living now but it was living in the past, and it has all five characteristics of life: it has cells, uses energy, reproduces, responds to stimuli, and grows and develops.
Cells are the basic unit of life in all living organisms. They are the smallest unit of an organism that can perform all the functions necessary for life, such as metabolism, growth, and reproduction. Cells can be divided into two main categories: prokaryotic and eukaryotic. Prokaryotic cells are simpler and smaller than eukaryotic cells, and are found in organisms such as bacteria. Eukaryotic cells are more complex and are found in organisms such as animals, plants, and fungi. All cells have a cell membrane, which acts as a barrier to control the movement of materials in and out of the cell, and a cytoplasm, which contains the cell's organelles and enzymes.
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What benefit of intensive gardening makes it worthwhile for plant scientists?
Ο Α.
A. higher yields in a small space
OB.
use of more land
OC.
use of less water
O D.
decreased need for fertilizer and pesticide
Answer:
A. Higher yields in a small space.
Explanation:
Intensive gardening allows for higher yields in a smaller space, as compared to traditional farming. This makes it beneficial for plant scientists, as it allows them to use less land, water, and fertilizer and pesticide, while still producing a higher yield. Additionally, intensive gardening is a more sustainable form of agriculture, allowing for efficient and sustainable use of resources.
true or false: villi and microvilli of the small intestine serve to increase surface area to allow for greater digestion and absorption.
True ,The villi and microvilli are folds on the small intestine's surface. These folds enhance the surface area of the intestine and give more space for food absorption.
Microvilli: The cells of the villi are densely packed with small hairlike structures known as microvilli. This increases the surface area of each individual cell, allowing each cell to absorb more nutrients.
The plicae circulares increase the mucosa of the small intestine 1.6 times. Morphometric data acquired from biopsies using light and electron microscopy show that villi and microvilli combined expand the small intestine surface area by 60-120 times.
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fatty acid biosynthesis depends on the presence of co2 (or hco3-) to generate malonyl-coenzyme a from acetyl-coenzyme a. if a culture of cells is grown in the presence of 14c-labeled bicarbonate, which carbons of the newly synthesized fatty acids would be expected to be radiolabeled?
If a culture of cells is grown in the presence of 14C-labeled bicarbonate, the carbons of the newly synthesized fatty acids that would be expected to be radiolabeled are those that come from the malonyl-CoA intermediate.
The biosynthesis of fatty acids starts with the conversion of acetyl-CoA to malonyl-CoA by the addition of CO2 (or HCO3-), a reaction that is catalyzed by the enzyme acetyl-CoA carboxylase (ACC). This reaction is the committed step of fatty acid biosynthesis, and malonyl-CoA is the precursor for the elongation of fatty acids. Therefore, the newly synthesized fatty acids would have their radiolabeled carbons in the carboxyl group coming from the malonyl-CoA intermediate, which is derived from the bicarbonate that was labeled with 14C.
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The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics.
What are they?
A. An ionic bond is formed between the oxygen and carbon atoms.
B. Four valence electrons are shared.
C. Two valence electrons are shared.
D. Valence electrons are shared between oxygen atoms
C and D. Two valence electrons are shared and valence electrons are shared between oxygen atoms.
A double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) is a covalent bond, not an ionic bond. In covalent bonding, atoms share electrons in order to fill their valence electron shells and achieve stability. In the case of a double bond between a carbon atom and two oxygen atoms, the carbon atom shares two valence electrons with each oxygen atom. This results in each oxygen atom having a full valence electron shell, and the carbon atom having four electrons in its valence shell. The sharing of these electrons creates a stable molecule of CO2.
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Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. They identify the gene responsible for toxin production. One allele (t1) codes for an enzyme that makes the toxin, and another allele (t2) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The allele frequency of t1 is determined to be 0. 6 and the allele frequency of t2 is 0. 4. What is the expected frequency of heterozygotes if the population is in hardy-weinberg equilibrium?.
48 per centage is the expected frequency of heterozygotes if the population is in hardy-weinberg equilibrium for The allele frequency of t1 is determined to be 0. 6 and the allele frequency of t2 is 0. 4.
hardy-weinberg equilibrium p2 +2pq+q2 =1
p = the frequency of the dominant allele in a population
q = the frequency of the recessive allele in a population
2pq = the frequency of the heterozygous dominant genotype
p2 = the frequency of homozygous dominant genotype
q2 = the frequency of homozygous recessive genotype
here in this case, p = 0.6 and q = 0.4
0.36+2pq+0.16=1
2pq= 1- 0.52
2pq= 0.48
In the absence of perturbing factors, the Hardy-Weinberg equilibrium states that the genetic variation in a population will remain constant from one generation to the next. The law predicts that genotype and allele frequencies will remain constant because they are in equilibrium when mating is random in a large population with no aversive conditions.
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In order for the NMDA receptor to fully open and allow an influx of calcium, both glutamate and glycine must bind to cause a depolarization of the cell that will ultimately displace which ion? Is the NMDA receptor an ionotropic or metabotropic receptor?a. Sodium - ionotropicb. Sodium - metabotropicc. Magnesium - metabotropicd. Magnesium - ionotropic
The NMDA receptor an ionotropic is Magnesium - ionotropic.
What is NMDA receptor?NMDA receptors (N-methyl-D-aspartate receptors) are a type of glutamate receptors found in the brain. They are involved in a variety of normal brain functions, including learning, memory, and neuronal development.NMDA receptors also play a role in modulating the release of neurotransmitters and have been implicated in a number of neurological disordersNMDA receptors are ionotropic, meaning they allow ions to pass through them, resulting in a change in the cell's electrical activity. They are also ligand-gated, meaning they open or close in response to the binding of specific molecules, such as glutamate and glycine.NMDA receptors are located on the surface of neurons and are composed of several parts, including a pore, which allows ions to pass through, and several subunits, which control the opening and closing of the receptor.Activation of NMDA receptors requires the binding of both glutamate and glycine, which opens the pore, allowing calcium ions to enter the neuron. The influx of calcium ions triggers a cascade of events in the neuron, resulting in the release of neurotransmitters, which then activate other neurons.To learn more about NMDA receptor refer to:
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Eight potato cylinder of the same size were used to investigate a certain physiological process. Four of the potato cylinders were placed in solution S. The other four potato cylinders were placed in solution T. After 2 hours, the potato cylinders from solution S were found to longer and stiff, while those from solution T were found to be shorter and flexible Explain the results in solution S and T.
Answer:
suggest answer for your qs
Explanation:
The results of the experiment suggest that the potato cylinders placed in solution S experienced an increase in size and stiffness due to osmosis. Osmosis is a process in which water moves from an area of higher water potential (solution S) to an area of lower water potential (the potato cylinders). This causes the potato cylinders to swell as the water moves into them. On the other hand, the potato cylinders placed in solution T experienced a decrease in size and flexibility due to osmosis. In this case, the water moves from an area of lower water potential (the potato cylinders) to an area of higher water potential (solution T). This causes the potato cylinders to shrink as the water moves out of them.
what was the central claim of the theory of blending inheritance?
Like the pigments in a painting, the physical substance that determines features varies among people is the central claim of the theory of blending inheritance.
According to the blended inheritance theory, phenotypes, or physical characteristics, are intermediates between the parents and their descendants. This hypothesis, for instance, predicts that if a tall man and a short woman have a child, the child will be intermediate in height to her parents. According to modern "blending inheritance" theories, children simply averaged out the traits of their parents. The following can be used to summarize the objective of blending: to ensure uniform properties of yarn; to prevent variance in textiles; to minimize minute differences in dyeing from lot to lot; to fully exploit the unique properties of each component of the blend; and to lower costs.
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what property of matter is related to inertia? how could this information be applies to the selection of materials for your mousetrap
The property of matter that causes this law to hold true is inertia. The inertia of an object is proportional to its mass. Inertia, however, is not the same as mass or momentum.
Physical and chemical properties are present in all matter. Physical properties, such as mass, color, and volume, are characteristics that scientists can measure without changing the composition of the sample under investigation (the amount of space occupied by a sample). Chemical properties describe a substance's characteristic ability to react and form new substances; they include flammability and corrosion susceptibility. A pure substance has the same chemical and physical properties in all samples. Pure copper, for example, is always a reddish-brown solid (a physical property) that dissolves in dilute nitric acid to form a blue solution and a brown gas (a chemical property).
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using resources wisely, such as sustainably using trees in a forest (cutting a few and replanting), is an example of which ethic? group of answer choices sustainable preservation anthropocentric conservation
Sustainably using resources, such as trees in a forest, is an example of sustainable preservation ethic.
Sustainable preservation is an ethic that aims to balance the needs of human society and the environment. It emphasizes the responsible use of natural resources, such as forests, so that they can be preserved for future generations. It involves cutting a few trees and replanting them, to ensure that the forest continues to provide resources for human use, while also preserving the biodiversity of the ecosystem.
Sustainable preservation differs from anthropocentric conservation which focuses on the human use of natural resources and the protection of resources that are important to human society, sometimes at the expense of preserving biodiversity.
It's important to note that sustainable preservation is an approach that considers the long-term viability of natural resources, while also considering the needs of the human society, and it's a way to balance the use of resources with preserving the environment.
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Which of these pathogens can NOT be transmitted congenitally or from mother to baby during childbirth?
Leptospira interrogans
Chlamydia trachomatis
human herpesvirus 2
Treponema pallidum
Congenital transmission of Leptospira interrogan from mother to fetus during birthing is not possible.
Obligate aerobic spirochaete Leptospira interrogan has spiral and hooked ends and is fashioned like a corkscrew. Warmer tropical areas are where L. interrogan is most frequently found. The bacteria can survive in the soil or water for weeks to months. One of the spirochaete phylum genera that causes serious mammalian illnesses is Leptospira. Some domestic and wild animals, especially dogs kept as pets, are pathogenic to this species. Infection can result in flu-like symptoms as well as kidney and liver damage in humans when it enters through skin abrasions.
Gram-negative, tightly wound, motile spirochetes with two periplasmic flagella, L. interrogan cells are tightly wound spirochetes. At each end of the bacterium, a flagellum is attached. The cells have a corkscrew-shaped body with spiral or hooked ends, and they are long—between 6 and 20 m—and thin—about 0.15 m. The name "interrogans" derives from the way the hooked ends frequently resemble a question mark. For the bacteria to move and live in particular host cells, the periplasmic flagella are essential. The leptospires exhibit both translational and non-translational movement, each of which is distinct.
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if the na /k atp-ase exchanged 4 na ions for every 2 k ions, how would the concentration gradients for na and k change compared to a typical cell?
Ionic transfer inequity results in a net efflux of positive charge, resulting in a polarized membrane with the inner surface slightly negative in relation to the outer surface.
The sodium-potassium pump performs active transport, which means it must add energy from somewhere else to pump ions against gradients. The primary energy-carrying molecule in the cell is adenosine triphosphate (ATP). An inorganic phosphate molecule is held in a high-energy bond with an adenosine diphosphate molecule to form ATP (ADP). When the pump's sodium-potassium-ATPase enzyme separates the phosphate from the ADP, the energy released powers the pump's transport action. The sodium-potassium pump regulates the neuron's membrane potential by maintaining constant disequilibrium in the concentrations of Na+ and K+.
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A solution of enzyme A has a pH of 8. Based on the graph, which pH change would result in higher enzyme activity
Based on the graph, a pH change to a lower value (closer to the enzyme's optimum pH) would result in higher enzyme activity. Enzymes generally have an optimum pH at which they function most efficiently. The pH of the solution is 8, but the optimum pH for enzyme A is at 7. So, a decrease in the pH from 8 to 7 would result in higher enzyme activity.
icd 10 code for lumbar stenosis with neurogenic claudication
Icd 10 code for lumbar stenosis with neurogenic claudication is M48.062.
Lumbar spinal stenosis (LSS) is an ailment where the spinal channel limits and packs the nerves and veins at the level of the lumbar vertebrae. Spinal stenosis may likewise influence the cervical or thoracic district, in which case it is known as cervical spinal stenosis or thoracic spinal stenosis. Lumbar spinal stenosis can cause torment in the low back or hindquarters, strange sensations, and the shortfall of sensation (deadness) in the legs, thighs, feet, or rump, or loss of bladder and entrail control.
Icd10 code for lumbar stenosis have:
M48.062 is a billable/explicit ICD-10-CM code that can be utilized to show a finding for repayment purposes.The 2023 version of ICD-10-CM M48.062 became successful on October 1, 2022.This is the American ICD-10-CM adaptation of M48.062 - other worldwide forms of ICD-10 M48.062 might vary.To know more about stenosis ,visit here:
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(Complete question) is:
icd 10 code for lumbar stenosis with neurogenic claudication_______.
which of the following is not true about the eye? select one: a. the third layer of the eye comprises the neural component of vision. b. the optic nerve is considered part of both the eye and the spinal cord. c. the aqueous humor enhances vision by providing shape, structure, and nutrients to the eye. d. the cornea is a membrane that allows light rays to pass into the eye.
Answer:The answer is B
Explanation: Because I got the right on my test
which of the sequences below best describes the sequential steps (numbered 1-5) in a signal transduction pathway that utilizes a g protein-coupled receptor?
The sequences below best is 3,1,5,2,4 .
A signal molecule binds to a receptor.The signal-receptor complex activates a G protein.cAMP is produced.Protein kinases are activated.Target proteins are phosphorylated.Many extracellular signals are detected by G Protein Coupled Receptors (GPCRs) and transduced to heterotrimeric G proteins, which then transduce these signals intracellular to suitable downstream effectors, playing a key part in numerous signaling cascades.
Kinase of proteins Signal molecules binding to G protein-coupled receptors can result in A activation.
The process by which a signal on the surface of a cell is transformed to a specific cellular response is known as signal transduction. Reception, transduction, and reaction are the three stages of signal transduction.
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Full Question ;
Which of the sequences below best describes the sequential steps (numbered 1-5) in a signal transduction pathway that utilizes a G protein-coupled receptor?
1.The signal-receptor complex activates a G protein.
2.Protein kinases are activated.
3.A signal molecule binds to a receptor.
4.Target proteins are phosphorylated.
5.cAMP is produced.
Describe the specifc contribution of each of the following researchers to the discovery of DNA structure:
DNA structure and function were discovered by Watson and Crick. Many people believe that English physicist Francis Crick and American scientist James Watson discovered DNA in the 1950s.
Francis Crick and James Watson worked together to identify the double helix structure of DNA. Francis Crick also made contributions to the development of the helical diffraction theory, which was helpful in comprehending the DNA structure. He also demonstrated how the three nucleotide bases of a single DNA strand may code for a specific amino acid.
Rosalind Franklin: She utilised x-ray diffraction to create images of DNA that Watson and Crick later used to determine the structure of the DNA molecule.
Francis Crick and James Watson worked together to identify the DNA structure.
The notion to examine DNA using X-ray crystallographic techniques originated with Maurice Wilkins.
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What type of selection is disruptive selection?
Disruptive selection is a type of natural selection that occurs when the environment favors individuals at both extremes of a trait population , while selecting. examples of disruptive selection are:
In a natural selection of finches, birds with larger beaks may be better able to crack open hard seeds, while birds with smaller beaks may be better able to feed on small insects. disruptive selection, Birds with beaks of intermediate size may not be able to perform either task as well and may be at a disadvantage. In a natural selection of plants, disruptive selection of plants with taller stems may be better able to compete for sunlight, while plants with shorter stems may be better able to survive in shade. In general, disruptive selection can occur when there are two distinct ecological niches, and the natural selection with traits that fit well into one of the niches have higher chances of survival and reproduction than the individuals with intermediate traits.
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Both animals and plants require energy to perform their daily life functions. Animals generally consume food and drink water through their mouths to gain energy. Which plant structure most similarly serves the function of a mouth?
A.
stem
B.
flowers
C.
roots
D.
leaves
Answer:
c
Explanation:
the roots suck up water for the plant
Answer:
c roots
Explanation:
The roots suck up the water and then it goes thru the stem so your root act as the mouth
as part of homeostatic control by hormones, the metabolism of electrolytes and water balance is controlled in part by the renal system. what hormone synthesized by the kidneys affects water and electrolyte balance?
As part of homeostatic control by hormones, the metabolism of electrolytes and water balance is controlled in part by the renal system. Renin is synthesized by the kidneys affects water and electrolyte balance.
Hormones are the primary means of communication between organs and tissues. Hormones regulate a variety of physiological and behavioural functions in vertebrates, including those involved in digestion, metabolism, respiration, sensory perception, sleep, excretion, breastfeeding, inducing stress, growth and development, locomotion, reproduction, and mood regulation. From germination to senescence, practically every phase of plant development is regulated by hormones. Hormones change distant cells' activity by binding to particular receptor proteins in the target cell.
The complete question is:
As part of homeostatic control by hormones, the metabolism of electrolytes and water balance is controlled in part by the renal system. What hormone synthesized by the kidneys affects water and electrolyte balance?
a.Aldosterone
b.Renin
c.Vasopressin; antidiuretic hormone (ADH)
d.Insulin
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nadia is exposed to high levels of radiation during the 6th, 7th, and 8th weeks of gestation. which organ structures in the fetus are most likely to show abnormalities? group of answer choices only the brain and spinal cord the heart and liver the palate of the mouth and the ears virtually all organ systems are vulnerable during this time
Nadia is exposed to high levels of radiation during the 6th, 7th, and 8th weeks of gestation so virtually all organ systems are vulnerable during this time.
There are 11 separate organ systems that make up the core of human anatomy and physiology. The 11 organ systems include the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal and muscular system, endocrine system, lymphatic system, neurological system, and reproductive system. The body has various systems in addition to organ systems. The immune system, which protects the body from infection, is not an organ system because it is not made up of organs.
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Diagram 1 shows the fossilized remains of the lower portion of a horse's leg. Each subsequent diagram shows the same portion of a horse's leg, but the diagrams are from progressively later time periods. Diagram 5 shows the most recent fossil.
Answer: D
What do these diagrams demonstrate?
A.
Modern horses have more toes than earlier species of horses.
B.
All living organisms have increased in size over time.
C.
Fossil evidence cannot be used to support evolution.
D.
fossil evidence can be used to show the evolution of a species over time
why do you think that scientists do not hypothesize that an asteroid impact caused the permian-triassic extinction?
According to the asteroid impact hypothesis, a large asteroid caused the dinosaurs' mass extinction. Geologists were unaware that the demise of the dinosaurs was a result of significant disasters.
What are hypotheses, exactly?Essentially, a hypothesis is a statement that is put up for discussion and then tested for veracity. The hypothesis is formed to use the scientific method before any pertinent research is conducted, aside from a brief assessment of the background.
An effective hypothesis sentence is...Clear, testable, and including a prediction, a solid hypothesis statement. "Testable" refers to something that can be verified or refuted, but it also denotes something that can be tested without compromising moral principles.
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Why isn't the fossil record 100% reliable?
phenylketonuria (pku) is a disease that results from a recessive gene. two normal parents produce a child with pku. what is the probability that a sperm from the father will contain the pku allele? 1/2 3/4 2/3 1/4 1/3 what is the probability that an egg from the mother will contain the pku allele?
Autosomal recessive traits include phenylketonuria . Phenylalanine is an amino acid that PKU patients cannot process.
There is phenylalanine in many everyday foods. However, it can accumulate in the bloodstream of kids with PKU. This can result in a variety of issues ranging in severity from mild to severe, including issues with growth, mood, behaviour, and thinking.
Both parents must be heterozygous if two healthy parents have a child with phenylketonuria .
Parents' genotypes are Aa and Aa.
1) A father's sperm has a 50% chance of carrying the PKU gene.
2) There is a 50% chance that an egg contains the PKU allele.
3) The likelihood that the following child will have PKU and the genotype aa is 1/4.
4) The chance that the following child will be heterozygous for the PKU allele is 50%.
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quizlwwr the release of thyrotropin-releasing hormone from the hypothalamus stimulates thyrotropin release from the pituitary, which further leads to synthesis and secretion of thyroid hormone from the thyroid gland. when the concentration of thyroid hormone in the blood turns off the release of thyrotropin from the pituitary, this is referred to as what type of feedback?
Following secretion at the median eminence, thyroid-stimulating hormone (TSH) goes to the anterior pituitary via the hypophyseal portal system where it binds to the TRH receptor and stimulates the release of prolactin from lactotropes and thyroid-stimulating hormone from thyrotropes.
Thyrotropin-releasing hormone (TRH) in the hypothalamus causes the anterior pituitary to secrete more thyroid-stimulating hormone (TSH). TSH then starts the thyroid gland's production of and release of thyroid hormone (TH). The principal regulator of thyroid gland growth and function is thyrotropin-releasing hormone (including the secretion of the thyroid hormones thyroxine and triiodothyronine). The cell bodies in the periventricular nucleus (PVN) of the hypothalamus produce the peptide hormone TRH.
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Is stabilizing selection adaptive?
Stabilizing selection is a type of natural selection that occurs when the environment favors population with intermediate traits, while selecting against individuals with extreme traits.
selection can lead to a decrease in genetic variation within a population over time, as traits that deviate too far from the norm are less likely to be passed on to future generations. Stabilizing selection can be considered adaptive because it can lead to the maintenance of a particular trait that is well-suited to the environment. For example, in a population of fish, fish with fins that are neither too big nor too small may be better able to swim efficiently and survive in their environment. Stabilizing selection can also help a population to maintain a balance of competing traits, such as trade-off between growth and reproduction. However, it is worth noting that stabilizing selection can also be maladaptive if the environment changes and the optimum trait that is being stabilized is no longer beneficial to the population.
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Juan received a class assignment to write about organisms that live in extreme environments. While doing research online, he found an image that showed microbial bodies thriving in hot springs. The organisms lacked a nucleus or defined organelles. Which organisms can he possibly find in such conditions?
Juan can find extremophiles such as bacteria, archaea, and some protists in hot springs in such conditions.
What is extremophiles?
Extremophiles are organisms that can survive in extreme environmental conditions such as extreme temperatures, high pressure, and high radiation. These organisms are typically found in habitats such as hydrothermal vents, deep-sea trenches, and other extreme environments. Extremophiles are able to survive due to their unique physiological adaptations that allow them to thrive in these extreme environments. Examples of these adaptations include the ability to resist extreme temperatures, produce anti-freeze proteins, and withstand high levels of radiation.They are also a valuable source of genetic information, playing a key role in our understanding of the molecular and cellular basis of life. In addition, extremophiles are being studied for their potential applications in biotechnology, such as the ability to produce novel enzymes and metabolic pathways.
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if you know the protien a cell makes, how could you detremine the dna code that coded for the protien
If we know the sequence of the amino acids in a protein then the particular DNA code can be obtained from it.
due to the process of translation and transcription DNA is changed first into R N A and then RNA is changed into protein. the protein consists of different amino acids which are linked to each other by different peptide bonds.
If the Amino acid sequence can be identified then we can easily find out the RNA sequence.
Then the RNA sequence can be changed into DNA sequence by using RNA dependent DNA polymerase enzyme.
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