In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called P700.
Photosystem I is a complex of integral membrane proteins. Its function is to capture the sunlight energy and excite an electron to mediate its flow through a series of electrons in order to make the usable form of energy ATP and NADPH. The wavelength of light absorbed by photosystem I is 700 nm.
Chlorophyll a is the most important type of chlorophyll essentially required for photosynthesis. It has the maximum capability to absorb the sunlight energy and convert it into chemical energy.
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Why is the cell membrane sometimes called the fluid mo-
saic model?
A Many small pieces make one moving design.
B
There is a lot of water in the cell membrane.
C The man who discovered its structure was named Mosaic.
D The cell membrane keeps fluids in the cell.
The cell membrane is sometimes referred to as the fluid mosaic model because A. Many small pieces make a single moving design (i.e. proteins arranged spread out like a mosaic).
The cell membrane, also known as the plasma membrane, is a thin structure consisting of two layers of lipids (lipid bilayer). Among the lipids consist of integral proteins and peripheral proteins arranged in a mosaic that surrounds a cell and each is inserted between two layers of lipids of a fluid consistency. Lipid molecules in cell membranes are amphiphilic, that is, they have a hydrophilic (polar) group on the head and a hydrophobic (non-polar) group on the tail. The cell membrane also consists of oligosaccharides, glycolipids, and cholesterol. Cholesterol is between the phospholipid molecules, and its presence can be reduces the fluidity of the cell membrane.
What general role does acetylation of histone protein amino acids play in the transcription of eukaryotic genes?.
Answer:
Histone acetylation events are most often associated with transcription activation.
Explanation:
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which muscle is highlighted? subclavius internal intercostal innermost intercostal splenius cervicis
The highlighted muscle in the given image is innermost intercostal.
Muscles are the mass of soft tissues that help in the movement of the various parts of the body. There are three types of muscles in human body. These are: the skeletal muscles, the categories muscles and the cardiac muscles. Skeletal muscles are the involuntary ones whereas the smooth and cardiac muscles are the voluntary ones that move on their own.
Innermost intercostal muscles are the third and innermost intercoastal muscles present at the intercostal spaces of the ribcage. It extends from the sternum to the ribcage. These muscles help the lungs during expiration.
The given question is incomplete, the complete question is
Which muscle is highlighted in the image given? subclavius, internal intercostal, innermost intercostal, splenius cervicis.
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the changes in the u.s. workforce that create challenges for human resource managers include:
The responses to the given question can be defined as the changes in the us workforce that create challenges for human resource managers.
What has been required by the violence?The variety and unequal outcomes wouldn't necessarily think violence requiring equal outcomes. Its elephants throughout the space have poor results between black with modest salaries. So being frank, higher related infant mortality, STDs but no school option should occur. Poor schools, poor police-citizens relations, gangs, security, etc.
Get a look at the root causes of the problem and take a good look at it. What we did not see now but the new BLM profile will not function. Black liberal arts colleges have for ages only spoken of creative approaches to also be mocked and they're not black enough. Shoot back, it was a cop.
Therefore, The responses to the given question can be defined as the changes in the us workforce that create challenges for human resource managers.
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White dwarf supernovae are good standard candles for distance measurements because?.
Due of their brightness, they may be used to calculate the separations between galaxies that are billions of light-years apart.
What qualifies a type La supernova as a reliable standard candle and a helpful tool for measuring distances?The visual magnitude of a type supernova, as witnessed from Earth, reveals its distance from Earth. Because of their constant peak luminosity, these explosions can be used as reference points to determine the distance to their host galaxies.
Why are supernovae useful as distance markers?Supernovae as distance indicators: positive and negative qualities. Very luminous, so it can be seen from a very long way away. With the most distant event occurring at z=3.9, astronomers have discovered supernovae much beyond z=1! Supernovae can therefore travel MUCH further into space than any other type of object.
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What is the function of the male pleopod in a crayfish
Answer: To transfer spermatophores (sperm) to the female crayfish during copulation.
if you measured the limb and body proportions of mammals that live in the arctic and compared them to measurements of mammals that live in the tropics, what trends would you predict?
Mammals will have shorter limbs and thicker bodies in colder environments than mammals in warm environments, on average.
Mammals are a group of vertebrate animals constituting the class Mammalia, characterized by the presence of mammary glands which in women produce milk for feeding their young, a neocortex, fur or hair, and 3 middle ear bones.
Mammals are vertebrates with hair, mammary glands used to suckle young with milk, a diaphragm, three bones inside the middle ear, and a lower jaw made of a single pair of bones that articulates in a unique way with the cranium.
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Which variable increases the likelihood of allopatric speciation taking place more quickly?.
Longer distances between separated groups increase the possibility of allopatric speciation, as their new niches will have more different environmental characteristics like climate and nutrient availability.
What triggers the allopatric speciation process?The accumulation of genetic variations between populations when they are geographically isolated results in allopatric speciation, a process for the evolution of reproductive isolation.
What factor is required for allopatric speciation?Isolation, time, and natural selection are a few of the conditions that must be met for allopatric speciation to take place. A population of the same species can become isolated due to earthquakes, floods, and migration.
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a cell that has just started interphase has four chromosomes total. how would the same cell look when it is in metaphase? (select the box next to the correct answer.)
A cell that has simply started interphase has four chromosomes total it might have an equal cell look when it's miles in metaphase at the top right. In Metaphase, the chromosomes
Prophase is the primary level in mitosis, happening after the conclusion of the G2 portion of interphase. at some stage in prophase, the determined cellular chromosomes which have been duplicated in the course of the S phase condense and become hundreds of instances greater compact than they had been at some stage in interphase.
The first and longest section of mitosis is prophase. at some point in prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down. In animal cells, the centrioles close to the nucleus start to separate and circulate to contrary poles of the cellular.
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What is the purpose for assigning two names to classify organisms?
Latin requires two words to name things.
The scientist who discovers the organism can assign a name.
The naming convention is the same throughout the world.
It shows how all organisms are different.
Latin requires two words to name things.
Each living thing has a two-part name that identifies both the genus and the particular species of the thing.
What is organisms?Every recognized species on earth is given a two-part scientific name, at least in theory. The term "binomial nomenclature" refers to this system. These names are significant because they enable clear communication about animal species among people all across the world.Every recognized species on earth is given a two-part scientific name, at least in theory. The term "binomial nomenclature" refers to this system. These names are significant because they enable clear communication about animal species among people all across the world.On this planet, there are literally millions of these organisms. In order to categorize the information about them, we need names for these organisms so that we can then catalog all of the information according to how organisms are related to one another and how they have evolved.To learn more about organisms refer to:
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natural selection, a process that increases adaptive traits through time, has three conditions or principles. one is variation, another is differential reproductive success, and the third is:
12) In order to attach a particular amino acid to the tRNA molecule for transport, an enzyme---
aminoacyl-tRNA synthetase--- is required along with ATP. The synthetase enzyme has open
binding site for ATP and another for the amino acid, but it is not yet able to attach the tRNA.
What must occur in order for the tRNA to be attached?
A) The ATP must first have to attach to the tRNA.
B) The binding of the first two molecules must cause a 3-D change that opens another binding
site on the enzyme.
C) The ATP must be hydrolyzed to allow the amino acid to bind to the synthetase.
(D))The tRNA molecule must have to alter its shape in order to be able to fit into the active site
with the other two molecules
Option B. The binding of the first two molecules must cause a 3-D change that opens another binding site on the enzyme. In order to attach a particular amino acid to the tRNA molecule for transport.
Ribonucleic acid (tRNA) is a type of RNA molecule that helps decode a messenger RNA (mRNA) collection right into a protein. tRNAs are characteristic at unique sites in the ribosome all through translation, which is a manner that synthesizes a protein from an mRNA molecule.
Transcript RNA is an adaptor molecule composed of RNA, usually 76 to 90 nucleotides in the period, that serves as the bodily hyperlink between the mRNA and the amino acid collection of proteins. switch RNA does this by wearing an amino acid to the protein synthesizing machinery of a mobile referred to as the ribosome.
An anticodon is a trinucleotide series placed at one cease of a transfer RNA (tRNA) molecule, which is complementary to a corresponding codon in a messenger RNA (mRNA) sequence.
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A 21-year-old male presents with inflammation of the testes. He has a high fever and edema and redness of the testes. Which organism is the most likely the cause of his symptoms?.
If he has a high fever and edema and redness of the testes. The most likely cause of his symptoms is mumps.
A vaccine can easily prevent mumps, a viral infection that affects the salivary glands. The parotid glands, or salivary glands below and in front of the ears, are affected by mumps. Infected saliva spreads the disease.
Mumps is the most prevalent infectious cause of orchitis, usually affecting men who have just turned men. The testicles would not swell as a result of herpes. Infection with Escherichia coli would not cause testicular swelling and redness. Testes are not affected by cytomegalovirus, a sexually transmitted disease.
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(Complete question)
A 21-year-old presents with inflammation of the testes and is diagnosed with orchitis. What is the most likely cause of his symptoms?
a. Herpes virus
b. Escherichia coli
c. Mumps
d. Cytomegalovirus
In what ways are red invasive fire ants (rifas) costly? (site 1)
Red invasive fire ants (RIFA) are costly because they can cause severe damage in variety of fields like in agricultural crops, in constructed building as well as electrical equipment. They can even kill the tissues of the person they sting by injecting some poison on to the area.
RIFA are the species of ants that are native to South America. They are simply called the fire ants. The species are believed to be spread in the soil carried through the cargo ships that then became spread profusely. Since they can reside at any area they are estimated to cause million dollars of damage every year.
Tissues are the aggregate of cells of similar type that come together in order to perform a similar function in a coordinated manner. There are different types of tissues in plants and in animals.
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Similarities are found between embryos of fish, dogs, and humans. What does this observation suggest?.
Similarities are found between the embryos of fish, dogs, and humans. This observation suggests that all these organisms have developed from a common ancestor.
What is Common ancestry?Common descent or ancestor is a concept in evolutionary biology which is applicable when one species is the ancestor of two or more different species later in time. All the living beings are descendants of a unique ancestor which is commonly referred to as the last universal common ancestor of all life forms on Earth, according to modern evolutionary biology.
Ancestral organism shared by two or more descendent lineages. For example, the common ancestors of two biological siblings include their parents and grandparents which are same; the common ancestors of a coyote and a wolf include the first canine and the first mammal.
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which of the following is not a probable explanation for the threshold of lactate appearance in the blood?
The threshold of lactate appearance in the blood cannot be explained by a high rate of carbohydrate metabolism.
How can I locate the graph's lactate threshold?How to determine lactate threshold: On a graph, the relationship between your blood lactate concentration and effort will be shown. The increase in lactate during exercise is largely linear up until your lactate threshold (LT), at which time the slope of the displayed line sharply increases; this is known as the inflection point.
The lactate threshold is where?Maximum steady-state exercise or "tempo runs" are terms frequently used to describe steady-state training at the lactate threshold. According to research, the lactate threshold is reached by trained persons at 80–90% of heart rate reserve (HRR) and by untrained individuals at 50–60% HRR (Weltman).
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How does the rda for iron for adult premenopausal woman compare to the rda for adult men?.
Men typically consume 16 to 18 mg of iron per day, while women typically take in 12 mg.
How much iron is required for a 40-year-old woman?Women between the ages of 19 and 50 require 18 mg of iron daily. In order to make up for the quantity of iron lost through sweat, female athletes have higher demands. Women who are over 51 years old need 8 mg of iron daily.
Is an iron shortage a common perimenopause symptom?A lack of iron is prevalent, particularly in premenopausal women who lose blood during their periods. The National Heart, Lung, and Blood Institute estimates that 20% of women under 50 have an iron deficiency.
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A gene called p53 code for a protein which ultimately hut off cell diviion if damaged DNA i detected. Which would be the mot likely outcome of cell diviion if the p53 gene mutate and no longer function?
Anwer option with 5 option
A. Cell diviion would be hut down completely. B. Cell diviion would reult in more cell with damaged DNA. C. Cell diviion would reult in fewer cell with damaged DNA. D. Cell diviion would reult in maller cell. E. Cell diviion would reult in cell identical to the normal cell
The likely effect of mutated p53 on cell division will be (B) Cell division would result in more cell with damaged DNA.
p53 is a gene also known by the name cellular tumor antigen p53. The gene encodes for a protein that is crucial for cancer prevention in humans. It regulates the cell division and growth of defective cells by either halting the division or causing cell death of the defective cell.
Cell division is the process of forming daughter cells from a cell by distributing its cytoplasm and nucleus into two parts. The daughter cells are genetically identical to the parent cell. Cell division can be of two types: Mitosis and Meiosis.
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Explain how two samples can produce identical dna fingerprints. Be sure to include the use of restriction enzymes and how they relate to dna nucleotide sequences in your explanation.
Two samples can produce identical dna fingerprints by cutting DNA samples by the same restriction enzymes and analyzing the resulting DNA fragments by DNA fingerprinting indicates which DNA samples have similar restriction sequences.
The restrict sequences alongside the DNA are inherited, thus, folks that are associated have comparable restrict sequences alongside their DNA. Cutting DNA samples via way of means of the equal restrict enzymes and studying the ensuing DNA fragments via way of means of DNA fingerprinting suggests which DNA samples have comparable restrict sequences.
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Mitosis and Meiosis 1. Read the information about mitosis and meiosis, in each bids, write the number of chromosomes that would be found in the cell at that stage in the process
The number of chromosomes after each stage of mitosis and meiosis are:
Mitosis:a single parent cell's process of dividing into two new daughter cells. A full set of chromosomes from the parent cell are transferred to each daughter cell.
mitosis starts with 23 pairs of chromosome thus total 46 chromosomes are there once it completes mitosis there are same number of chromosomes that is 46
Meiosis:In sexually reproducing organisms, meiosis is a kind of cell division that results in a reduction in the number of chromosomes in gametes.
Meiosis I begins with 46 chromosomes that is 23 pairs.
Half of the original 46 chromosomes, or 23 chromosomes, will be present in each daughter cell.
Each gamete cell has 23 chromosomes after meiosis II, when each parent cell is divided into two gametes.
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when the urinary bladder is full, receptors on the surface send a signal to the brain notifying it that the bladder is full. this is an example of a/n
When the urinary bladder is full, receptors on the surface send a signal to the brain notifying it that the bladder is full this is an example of a visceral sensory message.
The viscera, or internal organs, are the source of visceral sensory information. In order for the CNS to control their regulation, sensory neurons closely monitor the heart, lungs, stomach, and bladder.
Visceral sensory neurons keep an eye on the organ systems and internal surroundings. The somatic fibers in the peripheral nerves innervate the skin, muscles, joints, and body walls. Similar to this, internal organs and blood vessels are innervated by visceral fibers.
A visceral sensory region of the neocortex, the insular cortex (deep to sylvian fissure), receives input from the thalamus (ventral posterior nuclei). A visceral motor region of the neocortex is the medial frontal cortex, also known as the rostroventral cingulate gyrus.
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you make a smear of e. coli and then simple stain the slide with methylene blue. if you failed to use correct aseptic technique by not sterilizing the loop before picking up the bacterial sample for the smear, what results may be seen under the microscope?you make a smear of e. coli and then simple stain the slide with methylene blue. if you failed to use correct aseptic technique by not sterilizing the loop before picking up the bacterial sample for the smear, what results may be seen under the microscope?
The results which may be seen under the microscope when the correct aseptic technique is not used is that there may be cells of different shapes, sizes, and arrangements and is denoted as option B.
What is Aseptic technique?This is referred to as a type of medical practices and procedures which helps to protect patients and individuals from dangerous germs such as bacteria, virus etc.
In this scenario, we were told that the loop was not sterilized before picking up the bacterial sample for the smear which means that contamination is most likely to occur during the process.
This then leads to cells of different shapes, sizes, and arrangements being present when observed under the microscope thereby making option B the most correct choice in this context.
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The options are:
a) No cells may be visible on the slide.
b) There may be cells of different shapes, sizes, and arrangements.
c) Both blue and purple cells may be seen on the slide.
What is Taiga...?
Helpp :'v
Hello..!
¿What is Taiga?
It is one that has a vegetation typical of the continentally cold climate zone, and is composed of large forests and bushes.
¿What is Taiga?
The taiga or boreal forest is a biome characterized by its coniferous forest formations, being one of the largest forest masses on the planet.
Image Represented to observe the taiga.
describe how the surface area-to-volume ratio should be in order for cells to optimize the exchange of material through the plasma membrane.
The efficiency of material exchange through the plasma membrane increases with surface area to volume ratio.
Why is it called plasma membrane?Protoplasm, often known as plasm, is a tractor trailer living substance found inside every cell. The plasma membrane, a biological membrane, protects this living substance, also known as plasmic. In the ER, proteins that create membranes are put together. Lipid synthesis enzymes are present in this sensory organ, and as lipids are produced within the Era, they are incorporated into the organelle's inner membranes.
Where can you find plasma membrane?The term "cell" or "plasma membrane" refers to the outside layer that protects the cytoplasm and nucleus of live cells. The barrier has different permeability states. Cell walls are found on the outside of plant and bacterial cells. On the cell walls of animal cells, there is a cell membrane.
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the term population density describes the question 1 options: body size of different species. number of individuals per unit area. number of populations per unit area. number of species per unit area.
Population density is the number of individuals present per unit area or volume at a given time.
A populace is the whole set organization of people, whether or not that organization contains a state or a set of humans with a not unusual place characteristic.
To calculate the population density, you may divide the populace via way of means of the dimensions of the vicinity. Thus, Population Density = Number of People/Land Area. The unit of land vicinity ought to be rectangular miles or rectangular kilometers.
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A farmer raising cattle artificially inseminates his cows using the sperm of a bull instead of allowing them to become pregnant on their own. Why is this an example of artificial selection?.
The farmer chose which cows and bulls to breed based on their traits.
What is the process of breeding cattle for?
Artificial insemination (AI) involves placing sperm directly into the uterus. The embryonic transfer involves the transfer of fertilized ova from a donating female to a receptive female and the raising of a calf.
Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
Selective breeding is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
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.Which of the following incorrectly matches the term with its location?
DNA is found in a chromosome.
Chromosomes are found in the nucleus of a cell.
Genes are located in a nucleotide.
Nitrogen bases are located in the central rungs of a DNA ladder
Answer:
The correct answer is:Genes are located in a nucleotide. Rather, genes are segments of DNA which can be found within the nuclei of cells
Explanation:
23. Suggest a way in which the stoma and guard cells arrangement might work to control the
amount of water that is leaving the leaf.
Water would quickly evaporate if the opening was left open. Fortunately, guard cells are what open and close the stomata. This enables management of water loss and transpiration. In hot weather, guard cells close the stoma.
The guard cells and stoma at the base of the leaf blade serve what purposes?The stomata (stoma = "hole") in leaves are the entry and exit points for carbon dioxide and oxygen, which cannot pass through the cuticle. Stomata are opened and closed by guard cells. Plants lose water vapor to the atmosphere when their stomata are open, allowing gases to pass through the leaf surface.
When the environment is unfavorable, some plants reduce water loss by closing their stomata. In order to maintain a stable water balance in the leaf, plants frequently close or partially close their stomata when the humidity is low. This is because low humidity increases the likelihood that water will evaporate quickly from the surface of leaves.
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what is the action of the rectus abdominis musclemultiple choice rotation of trunk abduction of trunk extension of trunk flexion of trunk adduction of trunk
Main function of the rectus abdominis is rotation of trunk .
The Main function of the rectus abdominis is to move the body between the ribcage and the pelvis with the help of oblique muscles that are attached on each side of the rectus abdominis.
These oblique muscles allows the trunk to twist when ever their is contractions . Rectus abdominis helps in flexions of trunk while other abdominal muscles compress the abdominal wall and laterally rotate the trunk.
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This type of muscle contractions are responsible for the constant length of body's postural muscles, such as the muscles of the back.
Isomeric muscle contractions are responsible for the constant length of body's postural muscles.
Isometric contractions are contractions that is responsible for no change in the length of the muscle. No motion in joint or in limbs occurs. Isometric exercises are generally related to tightening (contractions) of a specific muscle or many muscles associated with each other of muscles.
During Isometric exercises, the muscle doesn't relatively changes their length. Also the affected joint also doesn't move. Isometric exercises help to maintain strength.
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