It's known as polyembryony when an egg has the capacity to develop into a mass of cells that frequently gives rise to multiple embryos (option c).
Unborn child or embryo?An embryo is created when an egg and sperm combine, forming a zygote that then divides rapidly. The embryo matures into a fetus as pregnancy goes on. A newborn or neonate is what the fetus is when it is born.
How do fetuses develop into children?The sperm and egg join forces to produce a zygote during fertilization in one of the fallopian tubes. A morula develops when the zygote descends the fallopian tube. When the morula enters the uterus, it develops into a blastocyst. Following that, a procedure known as implantation occurs in which the blastocyst burrows into the uterine lining.
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The initial reward center discovered by Olds and Milner was located in the a. hippocampus. b. brainstem. c. hypothalamus. d. spinal cord.
The initial reward center discovered by Olds and Milner was basically located in the 'hypothalamus'.
What exactly do you mean by hypothalamus?
The hypothalamus is a small region in the brain that serves as the control center for many vital functions, such as appetite, sleep, body temperature, and emotions. It is responsible for releasing hormones that regulate and coordinate these functions, as well as the autonomic nervous system. The hypothalamus is also involved in the regulation of stress levels and the body's response to it.
The reward center discovered by Olds and Milner is located in the hypothalamus, a small region of the brain located just below the thalamus. It is believed to be the primary region in the brain responsible for regulating emotions, appetite, and reward-seeking behavior. This region is believed to be the source of the rewarding sensation that Olds and Milner discovered when they stimulated it with electrical current.
Hence, option C is correct.
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How do you handle a reticulated python?
Handling a reticulated python requires caution and experience. You should ensure that you are using proper technique and safety measures, such as using two hands and never reaching over the top of the snake. A smooth, gliding motion should be used when handling a reticulated python, and the snake should never be grasped too tightly.
1. Always have a second person present to help you. Reticulated pythons can grow to be over 20 feet long, and it is difficult for one person to handle a snake of this size alone.
2. Use a snake hook to help control the snake's head. This will keep the snake at a safe distance and prevent it from biting you.
3. Support the snake's body with your hands or arms, being careful not to put too much pressure on any one part of the snake's body.
4. Keep the snake's head pointed away from you at all times, and be aware of the snake's tail, as it can be used to constrict you.
5. If the snake starts to become agitated, calmly and gently put it back in its enclosure and give it some space.
Remember, reticulated pythons are powerful and potentially dangerous animals, and should always be handled with caution and respect.
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The volume of blood that leaves the ____ must be close to the volume that returns.
A. capillary
B. hydrostatic pressure
C. plasma proteins
D. arteriolar
The volume of blood that leaves the capillary must be close to the volume that returns.
Capillaries are the smallest blood vessels in the body, where the exchange of substances between blood and tissues occurs. The volume of blood that leaves the capillary bed must be b to the volume that returns to maintain adequate perfusion and avoid fluid accumulation. This balance is achieved through the regulation of various factors, including hydrostatic pressure, oncotic pressure, and lymphatic drainage. Disruptions in this balance can lead to tissue damage and edema. Therefore, maintaining a delicate balance of capillary filtration and reabsorption is critical for the proper functioning of the circulatory system and overall health of the body.
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True/false?cyclic amp phosphodiesterase is an enzyme that catalyzes the conversion
True. An enzyme called cyclic amp phosphodiesterase is responsible for the conversion. In this study, the pathogenic bacteria Vibrio vulnificus was used to describe the enzyme.
CAMP phosphodiesterase (CpdA), which catalyzes the conversion of cAMP to AMP. Cyclic AMP (cAMP) phosphodiesterase-4 (PDE4) enzymes break down cAMP and support the compartmentalization of cAMP signaling by concentrating in specific intracellular locations and protein complexes.
The only enzyme that converts ATP into the second messenger 3′:5′-adenosine monophosphate (cyclic AMP) is adenylate cyclase (AC). Almost all eukaryotic cells can change how they operate by activating cyclic AMP-dependent protein kinase or cyclic AMP-gated ion channels. A membrane-bound enzyme called adenylyl cyclase produces the nucleotide cAMP inside of the cell from ATP.
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Prokaryotes are completely indispensable to which chemical cycle?A. CarbonB. PhosphorusC. WaterD. SulfurE. Nitrogen
Prokaryotes are completely indispensable to nitrogen cycle
Prokaryotes have a variety of functions in the nitrogen cycle. Nitrogen-fixing bacteria turn atmospheric nitrogen gas into ammonia in the soil and in the root nodules of some plants. Ammonia is converted to nitrites or nitrates by nitrifying bacteria.
By turning atmospheric nitrogen into the plant-useable form of ammonia and fixing nitrogen from the atmosphere into different forms of nitrogen sources, prokaryotes play a significant part in the nitrogen cycle.
In prokaryotes, the use of external nitrogen sources and intracellular production of nitrogen-containing molecules are handled by a huge variety of enzymes that are expressed in nitrogen cycle.
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What is the physical basis of the phototropic response?
The correct answer is cell elongation.The phototropic response is induced grow of the plant by the light stimulus. This process is called phototropism.
What causes cells to lengthen?Because the majority of cell elongation occurs after cell division has halted, most effects on proliferation factors and cell expansion factors are spaced out in time.Auxin is one signal that regulates both cell elongation and proliferation.
What is the cell elongation phase?These cells enlarge in the region for elongation as a result of the vacuole growing inside the cell.Cell enlargement and the formation of new cell walls take place in the cells that belong to the amplitude and phase.In this region, the cells change, developing larger vacuoles among other changes.
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transmembrane proteins move ions or molecules across a membrane against their concentration gradient. (True/False)
The transmembrane proteins move ions or molecules across a membrane against their concentration gradient. This statement is true.
The movement of ions or molecules against a concentration gradient from lower concentration to higher concentration across a cell membrane with the utilization of energy is known as active transport. Active transport needs cellular energy which is given by ATP hydrolysis. A transmembrane protein is a type of integral membrane protein that is present all over the surface of the cell membrane. Many transmembrane proteins function as gateway to permit the transport of specific substances while travelling across the cell membrane. These transmembrane proteins frequently undergo significant conformational changes to move any substance through the transmembrane. They are highly hydrophobic in nature and it aggregates and precipitates in water. They require detergents or nonpolar solvents for extraction by using denaturing agents.
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two living species can share similar traits not inherited by a common ancestor.
True or false?
A similarity between creatures known as homoplasy is one wasn't passed down through their common ancestor.
Species with such similar ancestries share traits?It's likely that each species received these characteristics from such a common ancestor if different species have similar physical characteristics. Homologous structures are traits that are comparable to each other because they shared an ancestor. Structural homology refers to the shared bone structure in the forelimbs of mammals like humans, birds, and whales.
Do whales and birds share a same ancestor?Whales, lizards, humans, and birds all have basic limb configurations in common. But how did such different creatures end up with the same kind of limb. The response is that, similar to how cousins may get a trait from their grandfather.
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What is the term to describe a fish at the post larval stage?
Beginning when the morphological transition from larva to juvenile, or when the larva acquires the characteristics of a usable fish, is known as the juvenile stage.
Fish eggs and larvae that cannot actively swim against currents are known as ichthyoplankton. Ichthyoplankton are remarkable because of how different they are from adults in appearance due to the difficulties of being so small and at sea.
As they grow into adults, fry go through numerous further developmental phases, which vary depending on the species. Throughout their first few months, young fish are typically referred to as fry (during their first few months to just less than one year in some species).
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In gel electrophoresis, DNA fragments migrate toward the negative pole of the electric field. true or false
In gel electrophoresis, DNA fragments migrate toward the negative pole of the electric field. Hence, the statement is True.
Gel electrophoresis is a scientific method for dividing molecules according to their charge and size. In this method, a gel matrix containing the desired material is subjected to an electric current. The size variety of the molecules to be separated determines whether the gel matrix should be constructed of polyacrylamide or agarose.DNA fragments are charged negatively in gel electrophoresis because of the negative phosphate groups in its backbone. As a result, when the gel is subjected to an electric current, the DNA fragments move in the direction of the positive electric field pole.
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in the planning process, what is the role of strategic goals and plans?
A strategic plan assists you in defining and communicating the path your organization will take over the following three to five years.
It incorporates your company's vision and purpose statements, as well as goals and activities to attain those goals. Strategic goals are significant because they influence priority setting, resource allocation, capability requirements, and budgeting. Individual and team objectives are used to focus and align all employees' efforts.
Input into the marketing, operations, information technology, and human resources plans for the coming years. Planning is a managerial role that entails identifying objectives and determining a course of action to achieve those objectives. Planning necessitates managers being aware of current environmental conditions and forecasting future conditions.
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What is the impulse that earth exerts on it during the first 0. 50 s of its fall?.
Since the impulse is equal to the change in momentum, the impulse that the Earth exerts on the object during the first 0.50 s of its fall is also 4.9 N s (newton seconds).
To calculate the impulse that the Earth exerts on an object during its fall, we can use the impulse-momentum theorem, which states that the impulse on an object is equal to the change in its momentum. The momentum of an object is given by the product of its mass and velocity.
Let's assume that the object has a mass of 1 kg and is falling freely due to gravity. The acceleration due to gravity near the Earth's surface is approximately 9.8 m/s^2.
During the first 0.50 s of the object's fall, its velocity increases from 0 m/s to (9.8 m/s^2) x (0.50 s) = 4.9 m/s.
Therefore, the initial momentum of the object is (1 kg) x (0 m/s) = 0 kg m/s, and its final momentum is (1 kg) x (4.9 m/s) = 4.9 kg m/s.
The change in momentum is (4.9 kg m/s) - (0 kg m/s) = 4.9 kg m/s.
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What can an elevated PSA mean?
An elevated PSA mean an enlarged or inflamed benign prostate gland.
As there are other causes of elevated PSA in addition to prostate cancer, an enlarged or inflamed benign prostate gland may be the cause. Benign prostatic hyperplasia, or the growth of the prostate that most men experience as they age, frequently causes high PSA readings.
The prostate produces a protein called PSA that is used to monitor the development of prostate cancer that has already been diagnosed. For the majority of patients, the PSA level is a very good indicator of recognised disease. Yet, there has long been debate concerning the usefulness of PSA as a tool for prostate cancer screening.
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What is the name formula for manganese II chloride?
As the dichloride salt for any type of manganese, MnCl₂, manganese(II) chloride is a substance. Manganese also has a variety of common oxidation states, like other transition metals.
The substance that is the most stable, +2, appears in aqueous solutions as a light pink tint. Organomanganese reagents in organic chemistry are synthesized from manganese chloride. In order to make dry cell batteries, manganese chloride is primarily used.
These substances can coexist if they have a lower oxidation number and cannot be reduced by one another. In light of the fact that Sn2+ cannot decrease Fe2+, FeCl2 and SnCl2 can coexist. The lungs, liver, and kidneys all suffer harm from prolonged exposure. Another neurological disorder called manganism can result from exposure to manganese dust or fumes.
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Question:
The cell organelle that packages material for secretion to the outside of the cell is
a. golgi apparatus
b. lysosome
c. peroxisome
d. mitochondrion
Cell Organelles:
The human body is composed of trillions of cells having different shapes, sizes, structures, and functions. Each cell contains highly organized structures that perform various types of specialized functions within the cell. These highly organized and specialized structures are called cell organelles.
Option a is Correct. The golgi apparatus is the cell organelle that contains material intended for secretion outside of the cell.
A cell organelle called the Golgi apparatus modifies, and distributes proteins and lipids made on the rough ER (i.e., endoplasmic reticulum).
Different chemicals are processed, sorted, and packaged by the Golgi apparatus for either internal or external usage by the cell. The Golgi apparatus, which is positioned near to the cell's nucleus, alters proteins that have been transported from the RER in transport vesicles.
Exocystosis is a membrane transport mechanism that expels cellular contents from the cell. In this location, a transport vesicle from the Golgi or another area of the cell combines with the plasma membrane to release its contents.
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Correct Question:
The cell organelle that packages material for secretion to the outside of the cell is called as :
a. golgi apparatus
b. lysosome
c. peroxisome
d. mitochondrion
During the breakdown of glucose, why is it beneficial to release energy a little at a time rather than all at once?
Breaking down glucose and releasing energy a little at a time is beneficial for reasons like:
Efficient use of energyAvoidance of damageRegulation of metabolismMore ATP productionGlucose is a simple sugar, also known as a monosaccharide, which is the most important source of energy for our body's cells. It is a type of carbohydrate and is the primary source of energy for our brain, muscles, and other organs.
Glucose is produced by the digestion of carbohydrates that we eat, such as sugars and starches, and is transported in the bloodstream to our cells where it is used as fuel. It is also stored in the liver and muscles in the form of glycogen, which can be quickly broken down into glucose when needed.
The release of energy a little at a time is a more efficient and beneficial way for cells to break down glucose and utilize the energy released.
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A male fruit fly (Drosophila melanogaster) with red eyes and long wings was mated with a female with purple eyes and vestigial wings. All of the offspring in the F1 generation had red eyes and long wings. These F1 flies were test crossed with purple-eyed, vestigial-winged flies. Their offspring, the F2 generation, appeared as indicated below.
If in the F1 and F2 generations the same characteristics appeared in both males and females, it would be safe to assume that these traits for eye color and wing length are...
Pilihan jawaban
are sex-linked
are sex-influenced characteristics
are autosomal characteristics
follow the Mendelian rule of independent assortment
On same chromosome come the genes for wing shape and eye colour.
the fruit fly's genes for wing size and eye colour On the fly's X chromosome is where Drosophila melanogaster can be found. Chromosome 15 has a specific area that is important for determining eye colour. OCA2 and HERC2 are two genes within this area that are situated quite close to one another. Linked genes are those that reside on the same chromosome. Linkage explains why some traits are typically passed down in families. The mutant variants of the wild type features red eyes and straight wings are purple eye (pr), arc bent wing (a), and vestigial wings (vg).
(A male fruit fly (Drosophila melanogaster) with red eyes and long wings was mated with a female with purple
eyes and vestigial wings. All of the offsprings in the F1 generation had red eyes and long wings. These F1
flies were test crossed with purple eyed, vestigial winged flies. Their offspring, the F2 generation, appeared
as indicated below.
125
124
18
red eyes, long wings
purple eyes, vestigial wings
purple eyes, long wings
red eyes, vestigial wings
Total
16
283
If in the F1 and F2 generations the same characteristics appeared in both male and females, it would be safe
to assume that these traits for eye color and wing length
a. are sex-linked.
b. vary in dominance according to sex.
c. are sex-influenced characteristics.
d. follow the Mendelian rule of independent assortment.)
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True or False? the tissue of the capsule in a moss is diploid.
The statement about the tissue of the capsule in moss being diploid is true.
Thus, the correct answer is true.
Funаriа is moss аnd it belongs to the dominion Bryophytа. Funаriа continues switching аmong the gаmetophytic depаrtment аnd sporophytic depаrtment phаse. The pill аnd setа belong to the sporophyte which undergoes meiosis to provide spores. In mosses, the dominаnt level is the hаploid generаtion (the gаmetophyte). This wаy thаt the green, leаfy gаmetophytic tissue is hаploid (hаs hаndiest one set of chromosomes). Eаch sporophyte plаnt consists of а pill, thаt's the middle of spore formаtion; а stаlk; аnd а foot thаt аttаches the sporophyte frаme to the end of the gаmetophyte. Eventuаlly, the diploid spores аre lаunched аnd, upon а hit germinаtion, develop into some other moss plаnt.
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Which two of the three types of muscles in the body are involuntary?
Answer: The two types of muscles in the body that are involuntary are smooth muscle and cardiac muscle.
Explanation:
Which is the most accurate and reliable means of taking body temperature?
A. oral
B. aural or tympanic
C. axillary
D. rectal
The most precise and trustworthy method for measuring body temperature is rectal.
How can you take your oral temperature in the most precise way?The most reliable indicator of the body's temperature is a person's rectal temperature. Temperature measurements in the mouth and axilla range from 1/2 to 1°F. Your tongue should be covered by the thermometer's tip. When the thermometer beeps to signify completion, keep your mouth shut around it for the prescribed amount of time. To read the number, remove the thermometer.
Which temperature is more reliable: the axilla or the mouth?The most inaccurate temperatures are typically those collected from the armpit. As long as the mouth is closed while the thermometer is in place, oral readings are typically accurate for older children and adults.
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Why is there less oxygen in the water near the ocean’s surface than in the water at lower depths?
A.
Oxygen is very heavy and sinks to the ocean floor.
B.
A lot of sea life consumes oxygen at the surface level.
C.
Most of the photosynthesizing organisms live on the ocean floor.
D.
Oxygen is absorbed at the surface level but cannot remain there.
Oxygen is absorbed in the surface level but cannot remain there, is the correct reason for less oxygen in the water near the ocean’s surface than in the water at lower depths.Therefore, the correct option is D.
What is the concentration of dissolved oxygen in seawater?The concentration of dissolved oxygen in seawater can vary depending on various factors like temperature, salinity, pressure, and depth. The reason for lower oxygen levels at the ocean's surface is that oxygen is absorbed from the atmosphere into the water through diffusion, a process in which molecules move from areas of high concentration to areas of low concentration.
This means that the surface water, which is in contact with the atmosphere, can absorb oxygen from the air.Hence, there is less amount of oxygen on the surface than at the depth of the seawater. Therefore, the correct option is D.
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In gel electrophoresis, DNA fragments migrate toward the negative pole of the electric field.
true/false? Explain.
The statement about the gel electrophoresis, DNА frаgments migrаte towаrd the negаtive pole of the electric field is true because since frаgments of double-strаnded DNА аre negаtively chаrged becаuse of the ionized phosphаte groups аlong the bаckbone, the molecules move towаrd the positive pole of the electric field.
Thus, the given statement is true.
What is gel electrophoresis?Gel electrophoresis is а technique used to sepаrаte DNА frаgments аccording to their size. DNА sаmples аre loаded into wells (indentаtions) аt one end of а gel, аnd аn electric current is аpplied to pull them through the gel. DNА frаgments аre negаtively chаrged, so they move towаrds the positive electrode. Becаuse аll DNА frаgments hаve the sаme аmount of chаrge per mаss, smаll frаgments move through the gel fаster thаn lаrge ones.
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the plant obtains nitrogen from this beneficial symbiotic relationship. True/False
Legumes and true rhizobia, another type of nitrogen-fixing soil bacterium, can cohabit together.
Are microbes dangerous?While most germs are not hazardous, there are some that can. These bacteria are an illustration of a pathogen. Pathogens are microbes that can cause disease. They emit toxins that really can infect you and have a high sexual reproduction rate within your body.
How did bacteria get started?The dirt, rocks, oceans, and even frozen snow are all habitats for bacteria on Earth. Many creatures, including plants, animals, and people, reside in or on other organisms. In the human body, bacterial cells outnumber human cells by a factor .
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a biological membrane is a bilayer that contains lipids with
Biological membranes are composed of amphipathic lipid molecules, with phospholipids being the most numerous.
The cell membrane (also known as the plasma membrane (PM), cytoplasmic membrane, or plasmalemma) is a biological membrane that separates and protects the interior of all cells from the outside world (the extracellular space).
The cell membrane is a lipid bilayer composed of two layers of phospholipids with cholesterols (a lipid component) interspersed between them, which maintains adequate membrane fluidity at different temperatures.
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Which type of mutation is least likely to result in a frameshift mutation?
When one nucleotide in the DNA sequence is swapped out for another, a substitution mutation happens. This could only change one amino acid in the protein because it wouldn't change your set of genes forward or backward.
What kind of mutation does not involve a frameshift?Substitutions in which one nucleotide is swapped out for another are not considered frameshift mutations. When there is a substitution mutation, only one amino acid is changed in the polypeptide.
What kind of mutation will be most likely to frameshift?Frameshift mutations occur when someone or more nucleotides are added or removed from the regular sequence of codons, supplied that its numbers of copies added or taken does not exceed the multiple of three.
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what name the three layers of the heart wall, and indicate the layer that is also called the visceral pericardium?A. EpicardiumB. MyocardiumC.Endocardium
The heart wall is made up of three layers of tissue. The epicardium, myocardium, and endocardium are the heart wall's three outer, middle, and inner layers, respectively.
What are the heart's three layers, and what layer is also known as the visceral pericardium?The outermost layer pericardium, middle temporal pericardium, and inner epicardium (sometimes known as the visceral pericardium) are the three membrane layers that make up the pericardium, which surrounds the outside of the heart.
What are the heart wall's three principal layers?There are three layers that make up the heart's wall: the epicardium, myocardium, or endocardium. In terms of embryology, the multiple levels of blood arteries and the two rows of the brain are analogous.
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why are seedless vascular plants considered paraphyletic rather than monophyletic?
Compared to non-vascular plants, vascular plants that do not produce seeds have a more recent common ancestor. The several groupings seen in seedless vascular plants do not have a common ancestor.
Are vascular seedless plants a paraphyletic group?Ferns and Lycophytes are two separate lineages that make up the paraphyletic group of creatures known as SVPs. The following traits are present in both of these lineages: In terms of morphology, sporophytes grow a variety of complex tissues, such as lignified vascular tissue, real roots, stems, and leaves.
What makes vascular plants without seeds unique?Plants with vascular tissue but no flowers or seeds are said to be seedless vascular plants. Unlike other vascular plants, which produce seeds, ferns and horsetails reproduce by producing haploid, unicellular spores.
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what process is the source of the co2 that root hairs release into the soil?
The process that is the source of the CO2 that root hairs release into the soil is cellular respiration.
What is cellular respiration?Cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water. It is a critical process for the survival of most living organisms and occurs in both plants and animals.
Why do root hairs release CO2 into the soil?Root hairs release CO2 into the soil as a byproduct of cellular respiration. The CO2 diffuses out of the root hairs and into the soil, where it can be taken up by nearby plant roots or microorganisms. This process helps to maintain a balance of gases in the soil and provides a source of carbon for soil organisms.
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Many bacteria adapt to adverse environmental conditions by modifying the composition of their cell membranes. For example, the membranes of bacteria subjected to heat stress often contain high levels of which of these compounds?Choose one:A. unsaturated fatty acidsB. saturated fatty acidsC. cholesterolD. ether-linked terpenoidsE. polyunsaturated fatty acids
Many bacteria adapt to adverse environmental conditions by modifying the composition of their cell membranes. For example, the membranes of bacteria subjected to heat stress often contain high levels of which of these compounds are unsaturated fatty acids.
How can it be explained in detail?Increases in the amount of unsaturated fatty acids are one of the most frequent alterations that bacteria make to their cell membranes in order to adapt to heat stress. This is because double bonds, which are found in the tails of unsaturated fatty acids, prohibit them from packing firmly together. The membrane becomes more fluid and flexible as a result, enabling it to continue to operate and preserve its integrity at high temperatures. The membrane becomes more stiff and is less able to withstand heat stress when saturated fatty acids are present. Since they lack double bonds, their straight tails can pack closely together.
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exons are parts of genes that code for specific proteins. true or false ?
exons are parts of genes that code for specific proteins is false the true is Some exons are coding, in that they contain information for making a protein, whereas others are non-coding.
What are the 4 types of proteins?The four levels of protein structure are primary, secondary, tertiary, and quaternary. It is helpful to understand the nature and function of each level of protein structure in order to fully understand how a protein works. By Tracy Kovach.
What are two types of protein?Protein can be categorized into two types: complete and incomplete proteins. Proteins are made up of smaller units, called amino acids. Complete proteins contain all of the amino acids your body needs and include meat, fish, poultry, dairy, and soy products.
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