A radial array of microtubules that extend from centrioles toward the plasma membrane in fungal, algal, and animal cells is collectively called aster.
What are microtubules?
Microtubules are tubular structured polymers which are found throughout the cytoplasm and forms a component of the cytoskeleton.
The cytoskeleton in cells are composed of the microtubules, microfilaments and intermediate filaments.
Microtubules play important structural role in the cell as well as in cell division, growth, and movement.
The term aster is used when an array of microtubules extend from centrioles toward the plasma membrane in fungal, algal, and animal cells.
In conclusion, microtubules are major components of the cytoskeleton and has been found to have an indefinite length.
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If your ________ is destroyed, the left side of your brain could not control the movements of your right hand.
a. brainstem
b. hippocampus
c. amygdala
d. corpus callosum
If your brainstem is destroyed, the left side of your brain could not control the movements of your right hand.
Brainstem- The brainstem is the region at the base of the brain that is located between the cervical spinal cord and the deep cerebral hemispheres. It plays a crucial role in controlling some involuntary bodily functions like breathing and heartbeat.
Spinal cord- A column of nerve fibers that extends from the skull base to the middle of the back. It has three thin membrane-like layers of protecting tissue covering it. The vertebrae encircle the spinal cord and its surrounding membranes (back bones).
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Semmelweis first promoted the use of disinfecting agents during surgery, such as the spraying of phenol in the operating room. True or false
Semmelweis first promoted the use of disinfecting agents during surgery, such as the spraying of phenol in the operating room. -FALSE
What are disinfectants?In the healthcare industry, a variety of disinfectants are employed either individually or in mixtures (for example, hydrogen peroxide and peracetic acid).Alcohols, chlorine and its derivatives, formaldehydes, glutaraldehydes, ortho-phthalaldehydes, hydrogen peroxide, iodophors, peracetic acid, phenolics, and quaternary ammonium compounds are some of these.These compounds are used in commercial formulations, which are distinct products that need to be registered with the EPA or approved by the FDA.Most of the time, a particular product has a certain application and should be utilised in a particular way.Users should thus carefully study labels to ensure that the right product is chosen for the intended usage and applied effectively.Disinfectants are not interchangeable, and using the wrong concentrations or the wrong ones can cost too much money.To learn more about disinfectants , refer to the following link:
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In the _____ cell signaling mechanism, the chemical messenger acts upon the cell producing the signal.
In the autocrine cell signaling mechanism, the chemical messenger acts upon the cell producing the signal.
Autocrine signaling is the process in which the chemical messenger secreted by a cell binds to the receptor pf the same cell and therefore, some change occurs in the cell. The example of this signaling is the T-lymphocyte proliferation, upon entry of foreign pathogen t cell can stimulate its own proliferation.
Chemical messenger are the molecules that are function to carry some signal or message from one part of the body to another. The examples of chemical messengers are the hormones, ligands, neurotransmitters, etc.
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Explain the relationships among monomers, polymers, condensation reactions and hydrolysis reactions.
The relationship between monomer and polymer is that monomer is the unit by which polymer is made up of or the long chain of monomer is known as polymer.
What is monomer?A monomer is a type of molecule that can make chemical bond with any molecule and can form a long chain and polymer is a sequence of chain of an unspecified or unknown number of monomers.
Monomers are small sized molecules and they are organic in nature that can combined with similar molecule to form very large size of molecule, or the molecule is known as polymer. The main example of monomers are glucose, amino acids, ethylene, and vinyl chloride. Each monomer combined to form polymers in other ways.
Therefore, The relationship between monomer and polymer is that monomer is the unit by which polymer is made up of or the long chain of monomer is known as polymer.
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In the fast block to polyspermy, binding of sperm opens up _________ channels, which depolarizes the egg membrane and _________.
Na+; prevents the entrance of any more sperm
In the fast block to polyspermy, binding of sperm opens up Na+ channels, which depolarizes the egg membrane and prevents the entrance of any more sperm.
What is the fats block to polygamy?The opening of Na+ channels in the egg plasma membrane is a quick stop to polyspermy. Na+ enters the egg cell and depolarizes its membrane. Additional sperm from fusing to the egg plasma membrane are prevented by this depolarization.How is polyspermy achieved?Altering the egg plasma membrane's electric potential causes a quick block to polyspermy. The ionic concentration of the egg is significantly different from that of its surroundings, and this membrane acts as a selective barrier between the egg's cytoplasm and the outer environment.What makes polyspermy block so crucial?A paternal excess of genome dosage in the endosperm causes aberrant seed development and seed abortion, therefore the polyspermy block in the central cell is crucial.To learn more about polyspermy visit:
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The pyrimidine found in both dna and rna is __ ___. the pyrimidine found only in dna is __ ___ while the pyrimidine found only in rna is __ ___.
The pyrimidine found in both dna and rna is cytosine. The pyrimidine found only in dna is thymine while the pyrimidine found only in rna is uracil.
Cytosine is one of the four nucleotide bases in DNA. Within a double-stranded DNA molecule, cytosine bases on one strand pair with guanine bases on the opposite strand. The sequence of the four nucleotide bases encodes DNA's information
Thymine helps stabilize nucleic acid structures
Uracil help carry out the synthesis of many enzymes necessary for cell function through bonding with ribose and phosphates.
Adenine and guanine will be the two primary varieties of purine. These both happen in both DNA as well as RNA. Only one of the three primary pyrimidine types cytosine is present in both DNA as well as RNA. The other two were uracil, which only occurs in RNA, and thymine, which only occurs in DNA.
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A process for determining whether data from genetic crosses are consistent with a specific pattern of inheritance is called?
Data from the genetic crosses are consistent with the specific pattern of the inheritance is called as Punnett square
The Punnett square is the table in which the all of the possible outcomes for the genetic cross between the two individuals with the known genotypes are given. In its the simplest form, the Punnett square was consists of the square divided into the four quadrants. A Punnett square was a chart that is allows you to easily determine the expected the percentage of the different genotypes in the offspring of two parents. An example of the Punnett square for the pea plants is shown as below. In this example, both the parents are heterozygous for the flower color (Pp).
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Carolina was always hungry. after visiting the doctor, she was told that her _________ was producing too much insulin, causing low blood sugar.
Carolina was always hungry. after visiting the doctor, she was told that her pancreas was producing too much insulin, causing low blood sugar.
What insulin is used for?Human insulin is used to control blood sugar in people with type 1 diabetes, a condition in which the body cannot produce insulin and cannot, therefore, control the amount of sugar in the blood, or type 2 diabetes, a condition in which the blood sugar is too high because the body cannot produce or use insulin normally, and which cannot be controlled by oral medications alone. The hormones class of drugs includes human insulin. In place of the insulin that the body ordinarily produces, human insulin is used.
Is insulin the same as sugar ?Insulin then aids in transferring the blood's sugar to your cells. Your cells either immediately use the sugar that enters them as fuel for energy, or they store it for later use. Insulin malfunctions occur in people with diabetes.
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Which widely-accepted set of ideas claims that all living things are made of very similar simple units with very similar characteristics?
All biological organisms are composed of extremely similar, basic units with very similar properties, according to the generally recognized cell theory.
What theory suggests all living things are made?
Theodor Schwann put forth the classical cell theory in 1839. This theory consists of three components. According to the first section, cells make up all organisms. Cells are the fundamental building blocks of life, according to the second portion.
Since the creation of the classical cell theory, technological advancements have made it possible to make more precise observations, which have resulted in fresh understandings of cells.
The modern cell theory was created as a result of these discoveries, and it has three main additions: first, that DNA is transferred between cells during cell division; second, that cells in all organisms belonging to the same species are largely similar in terms of their structural and chemical makeup; and third, that energy flow occurs within cells.
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Drugs that selectively stimulate contraction of the myometrium are known as _______________.
Drugs that selectively stimulate the contraction of the myocardium are known as oxytocic agents.
What is myocardium?The myocardium is the middle layer of the heart. It is the thickest layer between the single-layer endocardium and the outer epicardium. The myocardium is composed of cardiomyocytes.
The function of the myocardium is to facilitate the contraction and relaxation of the heart walls. It helps in the conduction of electrical stimuli.
Cardiac muscles are under to stimulate digoxin, dopamine. Cardiostimulatoy drug stimulate and enhances cardiac function increasing heart rate. Hypertension, Angina, myocardial infraction, and heart failure are some of the disorders related to the heart.
Therefore, Drugs that selectively stimulate the contraction of the myocardium are known as oxytocic agents.
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Darwin called the units of inheritance that pass traits from parents to offspring.
The units of inheritance that pass traits from parents to offspring as gemmules.
What is Darwin's theory of evolution?The biological evolution via natural selection idea was put out by British biologist Charles Darwin. According to Darwin, evolution is the process through which species change over time, give rise to new species, and descend from a single ancestor.
Natural selection is the theory of evolution put forward by Charles Darwin. Given the scarcity of resources in nature, animals with heritable features that promote survival and reproduction will often produce more offspring than their contemporaries, leading to a rise in the frequency of such traits across successive generations.
Populations change throughout time through natural selection, becoming increasingly adapted to their surroundings. Natural selection is reliant on the environment and necessitates the presence of heritable variation within a population.
Therefore, the units of inheritance are called gemmules.
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What advantages is there to knowing the phases of the moon
During a Moon's monthly cycle, there are eight phases: four major phases and four intermediate phases.
But why, exactly, does the moon have phases?
It's required to comprehend two crucial things in order to respond to this question.
Firstly, the moon orbits once every 29.5 days around the Earth. Second, the moon is illuminated by the sun at various angles as it travels around the globe.
Our predecessors had strong opinions on how the moon influenced people's actions.
Find out how...
Oceans, Gravity, and Vegetation:
The idea that the moon affects plant growth is supported by more than 200 research articles.
The gravitational pull of the moon affects tides. Researchers have recently investigated it to find out if the moon cycle affects the Arabidopsis thaliana plant. According to the results, the plant's roots grow in cycles that closely resemble the time of the moon's orbit.
Ancient wisdom and human behavior:
More evidence supporting the old belief that the moon can affect human conduct is provided by episodes of increased criminal activity and sleep loss.
Natural forces:
Again, it is entirely plausible that the electromagnetic fields that surround the earth and people, as well as the moon, can affect our behavior. It has been experimentally demonstrated that changes in electromagnetic fields can alter the circadian clocks of fruit flies.
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What is a possible rationale for the difference between the dna in chromatin and chromosome form?
A possible rationale for the difference between the DNA in chromatin and chromosome form is the structure of chromatin, loosely organized chromatin and condensed chromatin.
What is chromatin?Chromatin is a macromolecular structure composed of DNA and associated proteins called histones, which can be transcriptionally inactive (heterochromatin) or active (euchromatin).
The difference between chromosomes and chromatin is based on the level of organization, which is associated with diverse factors that make this structure dynamic for cell division and/or transcriptional activity.
In conclusion, possible rationales for the difference between the DNA in chromatin and chromosome form are associated with the structure of chromatin, loosely organized chromatin facilitates transcription and condensed chromatin keeps the DNA organized.
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Rings of muscle in the digestive tract that can open and close, regulating the movement of food into or out of parts of the digestive system, are:________
The ring of the muscle in the digestive tract, which can open and close, or regulate the movement of food into or out of parts of digestive system, is the pyloric sphincter.
Although the pyloric sphincter is present at the bottom of the stomach, and it is a muscular valve that opens to allow the food materials to pass from the stomach to the top of the small intestine of our digestive system.
Therefore, The pyloric sphincter serves as a type of gateway between stomach and small intestine, and It allows the contents of the stomach like food materials to pass into the small intestine. Also, It prevents digestive juices or partially digested food from re-entering into the stomach.
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In a human somatic cell (normal body cell) that is in g2, what would be true about chromosome number and structure? check all that apply.
Diploid- The terminology "diploid" describes an organism's cells having two full sets of chromosomes, with one chromosome from each parent present in each pair. Since humans are diploid, the majority of their cells have 23 pairs of chromosomes.
Chromosome- A component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome. There are typically 23 pairs of chromosomes in each cell.
Sister Chromatid- Sister chromatids are identical duplicate copies of one chromosome that are joined to one another.
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What is the purpose of a control group in a scientific experiment?
O to ensure that experimental results support the hypothesis
O to be a backup if something goes wrong with the experiment
O to serve as a basis of comparison with the experimental group
O to represent what happens when a variable is manipulated
Answer:
It is Between A & D. I think it's D.
Which class of antidiabetic drugs inhibits alpha glucosidase and delays glucose absorption?
Alpha-glucosidase inhibitors are a class of antidiabetic drugs that inhibits alpha-glucosidase and delays glucose absorption.
Alpha-glucosidase inhibitors are abbreviated as AGIs. AGIs inhibit the absorption of carbohydrates in the small intestine by inhibiting the action of enzymes such as alpha-glucosidase. Alpha-glucosidase is an enzyme that converts complex carbohydrates (e.g. Starch) into simple absorbable carbohydrates like glucose. Other enzymes that perform a similar function include sucrase, maltase, glucoamylase, and isomaltase.
Acarbose is the most commonly used Alpha-glucosidase inhibitor taken orally. AGIs are initiated with a lower dosage taken three times with the meal. Acarbose inhibits the action of enzymes like alpha-amylase, maltase, sucrase, and dextranase.
Due to the action of AGIs to inhibit the carbohydrate converting enzymes, they are named so. And with this preference, AGIs are used to delay glucose absorption.
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According to genome analysis, a member of the genus _________ is most closely related to the mitochondrion.
Rickettsia
According to genome analysis, a member of the genus Rickettsia is most closely related to the mitochondrion.
A category of illnesses known as rickettsioses are typically brought on by Rickettsia species, an obligate intracellular bacterial genus. Ticks carry the majority of the Rickettsioses, but fleas, lice, and mites can also carry them.What Rickettsia symptoms are present?Fever, headache, and rash are common symptoms of both parkeri rickettsiosis and RMSF, although the latter also frequently features the formation of an inoculation eschar at the site of tick attachment. Eschar is not frequently present in RMSF patients.How is rickettsia infection spread?The most common way that rickettsiae and rickettsia-like bacteria are transferred from animals to humans is through the bites of ticks, mites, fleas, or lice. Since they transport pathogenic germs from one host to another, ticks, mites, fleas, and lice are referred to as vectors.To learn more about rickettsia visit:
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A compound in which polysaccharides are linked to peptide fragments that provides the main source of structural support to the bacterial cell wall is?
Peptidoglycan is a compound in which polysaccharides are linked to peptide fragments that provide the main sources of structural support to the bacterial cell wall.
Peptidoglycan is a stiff coat that surrounds the cytoplasmic membrane of most bacteria. It protects bacterial cells from environmental stress and maintains cell shape throughout their life cycle. Hence, it provides the main source of structural support to the bacterial cell wall.
By encasing the cytoplasmic membrane of most bacteria, peptidoglycan is responsible for osmotic stability. It is a one-of-a-kind, net-like polymer composed of glycan strands that are connected together by peculiar peptides. The structure of bacterial peptidoglycan varies greatly due to changes in amino acid sequence, cross-link types, and the presence or absence of secondary modifications in both the glycan strands and peptides.
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The _______________ provide(s) an interface to the services provided by an operating system communication shared memory simulators system calls.
The system calls provide(s) an interface to the services provided by an operating system communication shared memory simulators system calls.
A system call in computing refers to the way in which a computer program requests a service from its operating system kernel at the time it is required. It can therefore be defined as the interaction between the program and the operating system.
System calls perform system-level operations, such as communicating with hardware devices, reading and writing files, by accessing the kernel operating system, which runs in kernel space.
What is an operating system?An operating system is the group or set of computer programs that manage the internal resources (memory, disk, information storage) and external resources of the computer.
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True of false. mobility is the range of movement a joint can move while stretching.
True, mobility is the range of movement a joint can move while stretching.
Movement- Movement is the act or condition of moving the location or orientation of the body or a bodily part from one position to another. One of the key characteristics of living things is movement. Amoeboid, ciliary, and muscular motions are the three basic categories of movement.
Joint- The area of the body where two or more bones unite to allow for movement is known as a joint. Every bone in the body has at least one joint where it joins another bone, with the exception of the hyoid bone in the neck. A joint's function determines its form. The term "articulation" can also refer to a joint.
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During which period of development is the unborn baby most at risk of developing a structural defect due to the effects of a teratogen, such as zika virus or lead?
During stage of development, an unborn child is most at risk of experiencing a structural defect as a result of exposure to a teratogen like the zika virus or lead
: embryonic period
What is the development of an embryo?
The first eight weeks of human embryonic development are referred to as embryonic development; from the start of the ninth week, the embryo is referred to as a fetus. The study of this growth in the first eight weeks following fertilization is known as human embryology. The average gestation (pregnancy) lasts 40 weeks, or nearly nine months.
Teratogens are substances or conditions that can lead to an embryo's deformity; these include alcohol, tobacco smoke, narcotics, maternal stress, and the age of the father. Due to the impact of teratogens, the unborn child is at a very high risk of acquiring structural problems during the embryonic stage. Teratogens can cause aberrant bone, muscle, and tendon growth.
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Vertebrate species of animals are estimated to be outnumbered by invertebrate species by a ratio of approximately ___:____ (
According to estimates, there are roughly 1: 30 invertebrate species for every one vertebrate species.
What is vertebrate?
An animal having a backbone is called a vertebrate.
What is invertebrate?
An animal which doesn't have a backbone is called a invertebrate.
According to estimates, there are roughly 30 invertebrate species for every one vertebrate species. Ratio is 1:30.
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The surfaces of the inner, terrestrial planets of our solar system are composed of ________.
The surfaces of the inner, terrestrial planets of our solar system are composed of volcanoes, craters, canyons, and mountains.
The interstitial planets are made up of rocks, silicates, minerals, carbon or in case of earth water as well. Generally the planets have an inner core made up of iron which is further surrounded by a mantle.
Our earth is the only planet in the universe which is found to have water at its surface while the planet Mars also has polar ice caps which are permanent just like our earth. The inner terrestrial planets consist of mercury, Venus, earth, and Mars.
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Bladder wrack grows more quickly than saw wrack.
Suggest an explanation why.
Answer: The bladders hold lots of air.
Epithelial tissues always exhibit polarity; that is, they have a free surface and a basal surface. false true
Epithelial tissues have apical and basolateral surface which is separated by different cellular junctions.
What are epithelial tissues?Epithelial tissues forms the protective lining of various body surfaces. Various body cavities and several glands contain epithelial tissues.
Epithelial tissues are important because of their function of protection, secretion and absorption.
The general structure of epithelial tissues consists of a cell-membrane, nucleus and a cytoplasm.
Based on the number, epithelial tissues are classified as:
Simple epithelial cells - made up of single cell layer.Stratified epithelial cells- made up of multiple cell layers.Based on their shape, epithelial tissues are further classified into:
Simple squamous and stratified squamous epithelial cellsSimple columnar and stratified columnar epithelial cellsSimple cuboidal cellsCiliated columnar and pseudostratified columnar epithelial cellsTransitional epithelial cells.Therefore, epithelial tissues are important in protecting the internal and external body organs.
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Inorganic elements that are extracted from the soil by plants and passed up the food chain are known as?
Inorganic elements that are extracted from the soil by plants and passed up the food chain are known a Minerals.
Minerals are inorganic compounds that make up the majority of the soil solution; among those needed by plants for structure and control are nitrogen (N) and potassium (K).Plants nevertheless need inorganic salts, which they take up from the soil around their roots. These salts contain the elements phosphorus (in the form of phosphate), chlorine (as the chloride ion), potassium, sulphur, calcium, magnesium, iron, manganese, boron, copper, and zinc.Group of creatures arranged from producers to consumers in the food chain, as well as prey, predators, scavengers, and decomposers. food chain. noun. each connected food chain within an ecosystem. Likewise known as a feeding cycle.To learn more about Minerals.
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A democracy can have both representative and direct characteristics at the same time.
Yes, democracy can have both representative and direct characteristics at the same time.
There are many both-elements democracies in the Middle and Western US states. On the one hand, they have legislatures made up of Representatives and Senators, which is obviously a representative democracy because the representatives are chosen by their constituents and serve as their representatives in the legislature. Many of these states also have the referendum and initiative processes. In places like South Dakota and Nebraska, voters can use the initiative process to collect signatures and put possible laws on the ballot; if the proposed law achieves a majority vote, it becomes a law and cannot be vetoed. This is a direct democracy since the voters are deciding whether legislation should be passed without using their representatives.
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List the importance of a binomial system of nomenclature.
Answer:
Binomial Nomenclature is important because it allows people from all over the world to communicate unambiguously about the various plant and animal species. Also, it makes sure that every scientific name is unique.
at high ph dna bases are in a keto tautomeric state resulting in decreased h-bonding stability and denaturation of dna strands
At high pH DNA is susceptible to alkaline denaturation that occur due to the abundance of hydroxide ions. It breaks the hydrogen bond and remove the hydrogen ion from the DNA base pairs.
Tautomeric state occur when the instant isomerization of nitrogen base occur to an alternative hydrogen bonding form that result into mutation. After this the mutation is corrected by by DNA polymerases ability.
This automerization occur when a proton transferred from one site to another site by steps in which the solvent is intermediary.
DNA polymerases is an enzyme which is responsible for forming new copies of DNA that is in the form of nucleic acid molecules.
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