In experimental research, while subjects in the experimental group received some special treatment in regard to the independent variable, subjects in the control group did not.
In a between-subjects experiment, only one condition is tested on each participant. A researcher might, for instance, assign half of a sample of 100 college students to write about a traumatic event and the other half to write about a neutral event. Or, out of a sample of 60 people with severe agoraphobia—a fear of open spaces—, a researcher might choose 20 to receive one of three different treatments. In a between-subjects experiment, it is absolutely necessary for the researcher to assign participants to conditions that, on average, make the different groups very similar to one another.
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select the answer choice with the correct order in which these structures evolved in plant cells: group of answer choices cell walls, mitochondria, chloroplasts mitochondria, chloroplasts, cell walls chloroplasts, mitochondria, cell walls chloroplasts, cell walls, mitochondria mitochondria, cell walls, chloroplasts
The correct order in which these structures evolved in plant cells is mitochondria, chloroplasts, cell walls. So, option 2 is correct.
Numerous crucial functions are carried out by mitochondria in plants. Their main function is to produce ATP by linking a membrane potential to the passage of electrons from NADH to O2 via the electron transport chain. The tricarboxylic acid cycle is used to produce NADH by oxidizing organic acids.
The organelle of photosynthesis is called a chloroplast. In order to create nourishment (sugar) for the plant, they harness light energy from the sun and combine it with water and carbon dioxide. Two phospholipid membranes, one inside the other, envelop the chloroplast.
Outside of the cell membrane, a cell is surrounded by a hard layer known as a cell wall. Other polysaccharides, in addition to cellulose and protein, can also be found in the cell wall. The cell wall offers defense and support to the structure. The cell wall contains pores that allow nutrients and water to enter and exit the cell. Additionally, the cell wall stops the plant cell from bursting if water gets inside.
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The actual form of the question is:
Select the answer choice with the correct order in which these structures evolved in plant cells:
1) cell walls, mitochondria, chloroplasts
2) mitochondria, chloroplasts, cell walls
3) chloroplasts, mitochondria, cell walls
4) chloroplasts, cell walls, mitochondria
5) mitochondria, cell walls, chloroplasts
refer to the graph and select the most appropriate statement: group of answer choices body mass is the dependent variable, and taxa (birds, mammals, reptiles) is the independent variable field metabolic rate is the dependent variable, and taxa (birds, mammals, reptiles) is the independent variable body mass is the independent lic rate is the dependent variable body mass is the dependent variable and field metabolic rate is the independent variable i do not know
Body mass is the dependent variable, and field metabolic rate is the independent variable.
The graph displays a relationship between two variables, body mass and field metabolic rate, across three taxa: birds, mammals, and reptiles. Based on this information, the most appropriate statement is that body mass is the dependent variable and field metabolic rate is the independent variable. This means that the value of body mass changes in response to changes in the value of field metabolic rate, and the graph shows the effect of variations in field metabolic rate on body mass across the three taxa.
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The complete Question is:
Which variable is dependent and which is independent variable in the graph of body mass and field metabolic rate for taxa (birds, mammals, reptiles)?
TRUE OR FALSE An individual is heterozygous for two linked genes, but whether its genotype is AB/ab or Ab/aB is not known. The individual is crossed with an ab/ab individual, and among the progeny are: 16 AB/ab; 54 Ab/ab; 46 aB/ab; 24 ab/ab.
These results imply that the genotype of the doubly heterozygous parent was AB/ab.
true or false and explain your answer
The statement about an individual being crossed with an ab/ab individual, and among the progeny has results that the genotype of the doubly heterozygous parent was AB/ab is false because the crossing with recessive аllele (аb/аb) gives the percentаge proportion of heterozygous dominаnt аllele аs 62% АB аnd 51% аb.
Thus, the correct answer is false.
This is test crossing. It is used to determine the genotype of heterozygote dominаnt аlleles, where the phenotype cаnnot be used to identify the genotypic proportion. The recessive аllele (аb/аb) аbove аre used to determine the proportion of inheritаnce of zygosity of the heterozygote аllele
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What does a botanist study? WHAT is it!!??!??!
HELLPPP MEEE PLSSSS
Answer:
Botanists study plants to try to understand how these processes work.
Explanation:
Hope this helps!
A little fun fact for you, their research is involved in enhancing crops, developing medicines, cleaning up contaminated sites, and even powering our cars!
human growth hormone (hgh) causes target cells to release insulin-like growth factors (igfs), which are hormones that promote
Human growth hormone (hGH) causes target cells to release insulin-like growth factors (IGFs), which are hormones that promote growth cell growth and division, glucose release, and protein synthesis.
IGFs mediate the effects of growth hormone (GH) and play an important role in the regulation of somatic growth and organ development including brain development.
IGFs (Insulin-like Growth Factors) has an important role in growth and development by regulating and controlling mitosis and cell anabolism. IGFs promote long bone growth by stimulating chondrocyte proliferation and maturation. This hormone also plays a key role in the growth and development of skeletal muscles.
So, the GH hormone will stimulate IGF to regulate somatic growth and organ development like glucose release, and protein synthesis.
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There are several ways to model a compound. One
type of model is shown.
"
НОНН
Н-С-С-С-С-О-Н
НННН
Mark this and return
What is the chemical formula for the molecule
represented by the model?
O CHO
O C4H₂O₂
о с н о
C3H8O₂
O
Save and Exit
Next
Submit
The chemical formula for the molecule represented by the model C3H8O2.
What are ways to model a compound?There are several ways to model a compound, including:
Chemical formula: This represents the number and type of atoms present in a molecule using symbols and subscripts.Ball and stick model: This model represents the atoms as spheres and the bonds between them as sticks.Space-filling model: This model represents the atoms as spheres and shows the relative sizes of the atoms and the space occupied by the molecule.Molecular orbitals model: This model represents the distribution of electrons in a molecule and can provide information about chemical reactivity and stability.Two-dimensional structural formula: This model represents the connectivity and arrangement of atoms in a molecule using symbols and lines to represent bonds.Three-dimensional molecular model: This model represents the shape and orientation of a molecule in space.Learn more about compound modelling, here:
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which of these is an abiotic element of a desert ecosystem
sand cactus lizard scorpion
Explanation:
A desert ecosystem is composed of both biotic and abiotic elements. Biotic elements refer to living components of an ecosystem, such as plants, animals, and fungi, while abiotic elements are non-living components, such as temperature, sunlight, and water.
The abiotic elements of a desert ecosystem are:
1. Temperature: Deserts are usually characterized by extreme temperatures, ranging from very hot to very cold. During the day, temperatures can soar to over 100 degrees Fahrenheit, while at night they can drop to freezing or below.
2. Sunlight: The desert's climate is largely determined by the amount of sunlight it receives. Deserts generally receive a lot of sunlight, which can be both beneficial and detrimental to the ecosystem.
3. Water: Water is the most critical abiotic element in a desert ecosystem, as it is the primary source of moisture for all living things. In some deserts, water is so scarce that it is only available through underground aquifers.
4. Soil: The type of soil found in a desert is usually very dry and nutrient-poor. This soil is not conducive to the growth of most plants, which is why deserts tend to be sparsely populated with plants.
Genes are often described according to the way they affect the characteristics of an organism, which are called ___.
it is not called anything
which of the following are appropriate hypotheses that the farmer could test? select all that apply.
The appropriate hypotheses that the farmer could test are options(a),(b), and(c)i.e, When fertilizer is added to the soil once every three months, almond trees live longer and produce larger almonds. Almond trees also produce more almonds when they are watered once daily and fertilized.
Fertilizers supply plants accompanying the items that grant permission to be absent or infrequent in a form that may be secondhand apiece plants for faster development. Most fertilizers supply nitrogen, planet seen at dawn, and potassium. Without fertilizers, the type struggles to fill the fibers in the soil. When crops are gathered, the main minerals are distant from the soil, cause they attend the crop and wind up at the furniture upon which to work.
If the soil is not stocked with accompanying minerals through fertilizing, crop yields will decay over occasion. Grow your almond wood in star, shaded from cold northward or concerning the direction to the east winds. The ideal soil for almonds is rich and well-exhausted, accompanying much of the natural resources to maintain liquid.
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The complete question is:
Which of the following are appropriate hypotheses that the farmer could test? Select all that apply.
a) Almond trees produce more almonds if they are watered once a day
b) Almond trees live longer if fertilizer is mixed into the soil once every three months
c) Almond trees produce larger almonds if they are watered daily and fertilizer is used.
You would like to determine the functional relationship between nuclear lamina disassembly and chromosome condensation, which both happen at the beginning of mitosis. Which of the following experiments would most help with your study? a) tag lamin A with GFP and monitor by live imaging b) mark the DNA fluorescently and monitor by live imaging (this can be done by expressing a fluorescent histone) c) prevent the disassembly of the nuclear lamina and monitor chromosome condensation d) perform immunofluorescence analysis with antibodies that detect the nuclear lamina and chromosomes e) prevent the assembly of the nuclear lamina and examine nuclear organization
To determine how nuclear lamina breakdown and chromosomal condensation, which start mitosis, are linked. "Prevent the disassembly of the nuclear lamina and monitor chromosome condensation" would most help the study. Option C is correct.
By preventing the disassembly of the nuclear lamina, researchers can examine whether this disassembly is required for chromosome condensation to occur. If chromosome condensation still occurs despite the lamina not disassembling, this would suggest that lamina disassembly is not necessary for chromosome condensation to take place.
If, on the other hand, chromosome condensation does not occur without lamina disassembly, this would suggest that the two processes are functionally connected. This experiment would therefore help to determine the functional relationship between the two events.
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a genetic disease is caused by an insertion in part of a gene. the insertion results in one copy of the gene being longer whereas the other copy is normal length. in the gel below, the dna sequences of this gene from four individuals have been amplified using pcr (the gel is loaded at the top of the tray). lane 1 of the gel shows an individual who does not have the disease. select the band(s) that represent(s) the insertion allele.
The genetic disease band(s) that are longer than the normal allele in lane 1 represent the insertion allele.
In the case of a genetic disease caused by an insertion in a gene, the insertion results in one copy of the gene being longer than the normal length. When the DNA from an individual is amplified using PCR, the insertion allele will appear as a band that is longer than the normal allele. In the gel, the insertion allele. The size difference between the normal allele and the insertion allele can be used to identify individuals who carry the disease-causing insertion and to diagnose the disease. It is important to note that the presence of the insertion allele does not necessarily mean an individual has the disease, as the expression of the genetic disease may be influenced by other factors such as environmental and epigenetic influences.
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The complete Question is:
Which band(s) on the PCR gel represent the insertion allele in individuals with the genetic disease caused by an insertion in a gene?
during the plateau phase of the action potentials of myocardial contractile cells, which ions are crossing the membrane
Both Ca2+ (calcium) and K+ (potassium) ions cross the membrane during the myocardial contractile cells' action potential plateau phase.
The cardiac action potential causes the membrane potential (voltage) of heart cell membranes to shift from one side to the other. Ions traveling between cells through ion channels cause this change in potential. The sinoatrial (S-A) node, a specialized group of cells that can produce an automatic action potential, is the source of cardiac potential. Through gap junctions, this action potential is transmitted to the other cells. The action potential of myocardial contractile cells has five phases. The membrane begins to repolarize during phase 2, also known as the plateau phase when its potential stays almost constant. The balance of charged ions entering and leaving the cell is reached. Calcium ions enter the cell through L-type channels, whereas potassium ions leave the cell through a delayed rectifier potassium ion channel.
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Edward Jenner noticed that the milkmaids who milked cows by hand often were infected with cowpox and that their infections were mild. He also noticed that these same milkmaids did not contract smallpox, which was a much more serious disease. He presumed that the cowpox infections prevented the milkmaids from contracting the much more serious disease of smallpox. Subsequently he began vaccinating people with the pus-like material from cowpox lesions to determine if his thinking was correct. In the story above, the underlined portion is a(n)
In this case, the milk maids were vaccinated in the process of contracting the cowpox.
What is vaccination?Vaccination is the process of administering a vaccine to an individual to help the body develop immunity to a specific disease. This helps protect against future infections by the disease-causing agent.
Vaccines work by introducing a weakened or dead form of the pathogen, or a piece of it, into the body, which triggers an immune response. This response helps the body recognize and fight the pathogen if it infects the body again in the future.
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The feet of modern horses have a ___________ toe(s) in contrast, early horses had __________ toe(s) on their front feet and ______ toe(s) on their hind feet.
The feet of modern horses have a single toe in contrast, early horses had four toes on their front feet and three toes on their hind feet.
Hyracotherium, a little woodland creature from the early Eocene, was the first horse. It was between 10 and 20" tall and did not resemble a horse at all. With an arched back, a short neck, a short snout, short legs, and a long tail, it resembled a dog.
Three or four of the horse's original toes were functioning. However, many horses lost their side toes and evolved a single hoof throughout the course of millions of years of development. Only horses with single-toed hooves still exist today, but the bones above their hooves still bear signs of small vestigial toes.
However today, grassland with plants, resembling steppes or grasslands, replaced the forest. The horses that were alive at the time altered in response to and adaptation to their surroundings. They expanded in size (Mesohippus was roughly the size of a goat), and their legs lengthened so they could sprint more quickly.
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which of the following is a similarity between cilia and flagella? which of the following is a similarity between cilia and flagella? both are on the surface of human sperm cells. both are long. both are on the surface of respiratory epithelium. both are involved in human reproduction.
Both cilia and flagella are long and involved in movement.
Cilia and flagella are structures that extend from the surface of cells and are used to move liquids and particles over the surface of cells or to move the cells themselves. Cilia and flagella share a similar structure, with a microtubule core surrounded by an axoneme and covered by a plasma membrane.
Both cilia and flagella are used for similar functions, such as the movement of mucus in the respiratory system and the movement of sperm in human reproduction. In particular, both cilia and flagella are present on the surface of human sperm cells and are involved in human reproduction.
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which statement best describes an operon? view available hint(s)for part a which statement best describes an operon? several genes, next to each other in eukaryotic dna, that are transcribed as a single piece of mrna a single gene in prokaryotic dna that is transcribed as a single piece of mrna several genes, at different locations in prokaryotic dna, which are transcribed as a single piece of mrna several genes, next to each other in prokaryotic dna, that are transcribed as a single piece of mrna
Operon is several genes, next to each other in prokaryotic DNA, that are transcribed as a single piece of mRNA.
An operon is a unit of DNA control found in prokaryotic organisms, such as bacteria. It consists of several genes that are located next to each other on the DNA strand and are transcribed as a single piece of mRNA. This means that all of the genes within the operon are transcribed into a single messenger RNA molecule, which can then be translated into proteins. The operon is controlled by a promoter, which is a specific DNA sequence that signals the start of transcription, and a regulator gene, which controls the expression of the operon. The operon system allows for the coordinated regulation of multiple genes, which can be particularly useful in response to changing environmental conditions, such as the presence of a specific nutrient.
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l nerd help pleaseee
Answer:
SR Sr sR sr
SR SSRR SSRr SsRR SsRr
Sr SSRr SSrr Ss Rr Ssrr
sR SsRR SsRr ssRR ssRs
sr SsRr Ssrr ssRr ssrr
What is splenomegaly test?
Explanation:
hich of the following phrases incorrectly finishes this statement? a genetic disease that causes death in infancy and has an autosomal recessive inheritance pattern can persist in a population because
The phrase which incorrectly finishes this statement is that if both parents are carriers, they have a 50% chance of having normal children.
What is an Autosomal recessive disorder?This is the type of disorder which involves two copies of the mutation being sufficient enough to cause the disease.If both parents are carriers, then the chance of having normal children is zero and not 50 percent.
What is a typical 7-year-old?Today's kids can dress themselves, tie their shoes, and grasp a ball using their hands more easily.The need for independence from of the family has increased.Because of events like starting school, children at this age engage in a lot of outside interaction.
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DNA codes for _?_, which account for the heritable characteristics of an organism.
a monosaccharides
b fatty acids
c fats
d proteins
DNA codes for proteins. Therefore option (D) is correct.
What does DNA code for?Deoxyribonucleic acid (DNA) is the genetic material that codes for the heritable characteristics of an organism. DNA stores information in the form of a code made up of four nucleotide bases (adenine, guanine, cytosine, and thymine) arranged in a specific sequence.
This sequence provides the instructions for the synthesis of proteins, which carry out the majority of cellular functions and determine an organism's physical traits. Thus, DNA acts as the blueprint for the development and functioning of all living things, from bacteria to humans.
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based on this diagram, which two systems interact to maintain homeostasis? responses the immune and circulatory systems work together to circulate blood through the pancreas. the immune and circulatory systems work together to circulate blood through the pancreas. the circulatory and endocrine systems work together to keep blood sugar levels constant. the circulatory and endocrine systems work together to keep blood sugar levels constant. the nervous and reproductive systems work together to stimulate the production of insulin. the nervous and reproductive systems work together to stimulate the production of insulin. the excretory and nervous systems work together to convert glycogen int
The two systems that interact to maintain homeostasis are the circulatory and endocrine systems, which collaborate to keep blood sugar levels constantly. The correct answer is option(b).
Homeostasis is the state of constant internal, tangible, and synthetic environments upheld by living systems. This is the condition of optimum functioning for the creature and contains many variables, to a degree crowd temperature and fluid balance, being preserved inside sure pre-set limits.
Homeostasis upholds optimal environments for catalyst operation during the whole of the crowd, as well as all cell functions. It supports neverending surroundings despite changes in within and extrinsic environments. In the human body, these include the control of blood glucose aggregation.
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The complete question is:
based on this diagram, which two systems interact to maintain homeostasis?
The immune and circulatory systems work together to circulate blood through the pancreas.The circulatory and endocrine systems work together to keep blood sugar levels constant. The nervous and reproductive systems work together to stimulate the production of insulin.The excretory and nervous systems work together to convert glycogen int.in humans long eyelashes is dominant (e ) to short eyelashes (ee), having dimples (d ) is dominant to not having dimples (dd) and free ear lobes (f ) are dominant to attached earlobes (ff). what is the likelihood of producing a child with long eyelashes, dimples and attached earlobes from the following cross? eeddff x eeddff
The likelihood of producing a human with these traits from the cross Eeddff x Eeddff is 1 out of 4, or 25%.
A Punnett square is a grid that displays the potential progeny of a cross between two people. The children can be read from the other axis of the grid, and each box in the grid represents a potential gamete (sperm or egg) that can be generated by one of the parents.
The parent Eeddff can produce either E or e for the first attribute (eyelashes), and the parent Eeddff can create either E or e as well. The Punnett square for the eyelash characteristic is as follows: According to the last Punnett square, only one probable human, DdFE, possesses long eyelashes (E), dimples (D), and attached earlobes (f).
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which of the following is not an example of an elastic moduli? which of the following is not an example of an elastic moduli? young's modulus impression modulus bulk modulus shear modulus
Option B: impression modulus is not an example of an elastic moduli.
The elastic limit on the stress-strain is significant to the structural and manufacturing industries because it indicates the greatest stress a certain material can withstand before permanently deforming. The ratio of stress to strain is known as the modulus of elasticity. Young's modulus, shear modulus, and bulk modulus are the three forms of elastic moduli that can exist. Thus, impression modulus is not an example.
Numerous studies demonstrate that for a given material, the amount of strain produced is the same whether the stress is compressive or tensile. The ratio of the longitudinal strain (ε) to the tensile/compressive stress (σ) is known as the Young's modulus (Y).
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Which of the following muscles is named for its location? Multiple Choice O Rhomboideus major O Teres major O Trapezius O Deltoid O Quadriceps femoris'
The correct option is D; Quadriceps femoris' . Some muscles, such as the gluteal muscles of the buttocks, are named from their size and placement. Other muscle names, such as the tibialis anterior, can refer to the muscle's position in the body or the bones with which it is linked.
Skeletal muscle is situated between bones and connects the epimysium to the periosteum, or outer layer of bone, via tendons.
Each type of muscle tissue in the human body has a distinct structure and function. Skeletal muscle is responsible for the movement of bones and other structures. To pump blood, cardiac muscle contracts. To facilitate bodily processes, the smooth muscle tissue that forms organs such as the stomach and bladder changes shape.
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Which of the following conditions would LEAST likely present with an acute onset of respiratory distress?
A) Pneumonia
B) Anaphylaxis
C) Pneumothorax
D) Pulmonary embolism
Anaphylaxis would LEAST likely present with an acute onset of respiratory distress
Anaphylaxis is a severe allergic reaction that typically causes symptoms such as skin rash, hives, swelling, difficulty breathing, and low blood pressure. While anaphylaxis can cause respiratory distress, the onset of symptoms is usually more rapid and less gradual compared to other respiratory conditions such as pneumonia, pneumothorax, or pulmonary embolism. These other conditions often present with an acute onset of respiratory distress and may also cause chest pain, coughing, and shortness of breath. In contrast, anaphylaxis is characterized by a rapid and widespread allergic reaction, which can quickly progress to severe respiratory distress. However, it is worth noting that anaphylaxis can be life-threatening and requires prompt medical attention.
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A coral species that currently inhabits a single reef off the coast of Indonesia would be considered... 1. vestigial. 2. a transitional form. 3. endemic. 4. exotiv
Endemic coral species are those that can only be found on a single reef off of the coast of Indonesia.
What is it called when evolutionary unrelated groups resemble one another because they have adapted to the same environments?Convergent evolution, as used in evolutionary biology, is the process through which dissimilarly related animals independently develop comparable features to meet comparable needs.
What factors likely to make populations more genetically diverse?By implementing new alleles into populations, gene flow encourages genetic diversity, and it also tends to converge the allele frequencies of nearby populations.
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complete the following paragraph to describe chemical cycling and energy flow in an ecosystem. some words may be used more than once.
An ecosystem is a system in which matter cycles and energy flows. Let's take a closer look at how various living activities influence the movement of energy and matter in ecosystems to better understand why this is the case.
When producers engage in photosynthesis, they draw energy from the sun and store it as chemical potential energy, which is how energy enters an ecosystem. In this process, materials from the environment is ingested and rearranged into organic molecules as CO₂ and H₂O. (sugars). These organic molecules can either be stored as biomass or used to power the producers' biological functions through cellular respiration, which generates heat and CO₂.
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Within a developed multicellular organism, all cells possess the ability to divide and do so regularly.
Choose one:
A. It is false, because some cells lose the ability to replicate their DNA and divide.
B. It is false, because most multicellular organisms cannot reproduce at all.
C. It is true, because all cells can always replicate their DNA in the same manner.
D. It is true, because all cells can always split into two cells in the same manner.
Answer:
A - false,
Explanation:
because some cells lose the ability to replicate their DNA and divide.
each of the following statements concerning the gram-positive cell wall is true except question 14 options: it protects the cell in a hypertonic environment. it contains teichoic acids. it is sensitive to lysozyme. it is sensitive to penicillin. it maintains the shape of the cell.
Each of the following statements concerning the gram-positive cell wall is true except option A: it protects the cell in a hypertonic environment.
In either of the hypertonic or hypotonic settings, the cell wall plays no protective role for the cell. The concentration gradient that forms in a hypertonic environment causes water to flow out of the cell, and no matter what type of cell wall is there, it cannot block this process. Thus, option A is not involved.
The form of the cell is preserved by the gram-positive cell wall. The gram-positive cell wall has been shown in studies to be susceptible to lysozyme. The cell walls of gram-positive bacteria contain techoic acids that are active. Additionally, numerous studies have demonstrated that the antibiotic penicillin is susceptible to gram-positive cell walls. As a result, the statement "it protects the cell in a hypertonic environment" is untrue.
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FILL IN THE BLANK. the scapula is blank to the breastbone. (click to select) the nose is blank to the eyes
With the aid of the clavicle, the scapula is attached to the sternum or breast bone. The word that can fill the blank is connected. Hence, the scapula is connected to the breastbone.
With the aid of the clavicle, the scapula is attached to the sternum or breast bone. The shoulder girdle sometimes referred to as the collarbone, is made up of the clavicle and scapula. It is a component of the central and axial skeleton. At the middle of the anterior thorax, the sternum, often known as the breast bone, is made up of the manubrium, body, and xiphoid process.
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