Amniocentesis is a procedure for obtaining fetal cells in a sample from the fluid surrounding the fetus.
A medical procedure called amniocentesis involves taking a small sample of the fluid surrounding a developing child in the womb (amniotic fluid). Cells from the fetus are present in the fluid, which can be used to test for certain genetic diseases and chromosomal abnormalities.
The treatment typically lasts 30 minutes and is carried out between the 15th and 20th weeks of pregnancy. The uterus is reached through the abdominal wall, and a tiny amount of amniotic fluid is drawn out. The fluid is subsequently taken to a lab for analysis.
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during early embryonic development, which of the following structures supply nutrition to the growing embryo?
Answer:
umbilical cord
Explanation:
The works of Andreas Vesalius and William Harvey caused tensions with the Church because they
questioned the geocentric theory
dissected humans
wrote in the common languages
rejected the authority of the Bible
The works of Andreas Vesalius and William Harvey caused tensions with the Church because they
B. dissected humans.Who was Andreas Vesalius?Andreas Vesalius and William Harvey were influential figures in the field of anatomy and physiology during the Renaissance period. However, their work challenged the traditional beliefs of the time, including the work of Galen, a Greek physician who was widely accepted as the authority in the field.
Vesalius and Harvey's dissections of human cadavers for scientific purposes were seen as heretical and in conflict with the Church's teachings, which held that the human body was sacred and should not be dissected. This caused tensions with the Church and made them controversial figures, as their work was seen as challenging the authority of the Church and undermining traditional medical beliefs.
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Where do the high-energy electrons come from to power:
Photosynthesis
Aerobic Respiration
Fermentation
Inorganic chemical-based Chemosynthesis (or Chemoautotrophy)
Answer:
High energy electron come from photosynthesis.
Explanation:
Sun is primary source of energy. All the energy come from
Testosterone is a cholesterol containing hormone produced by interstial Leydig cells inside the testes. Testosterone is circulated by the bloodstream to a variety of target cells within the body including the Sertoli cells responsible for spermatogenesis where it moves directly through the cell membrane to find a receptor inside the cells. Which of the following is true regarding testosterone?a. Testosterone is a lipid-based steroid hormone involved in endocrine signaling.b. Testosterone is a protein hormone involved in paracrine signaling.c. Testosterone is a protein hormone involved in endocrine signaling.d. Testosterone is a lipid-based steroid hormone involved in paracrine signaling.
The correct answer is "a. Testosterone is a lipid-based steroid hormone involved in endocrine signaling."
What is the role of testosterone?Testosterone is a steroid hormone, which means that it is derived from cholesterol and has a lipid structure. Steroid hormones are hydrophobic, or water-insoluble, and are able to diffuse across cell membranes to reach their target cells. In this way, testosterone is able to move directly through the cell membrane of the Sertoli cells to bind to its receptors inside the cells.
Testosterone acts through endocrine signaling, which means that it is produced and secreted by specialized cells, the interstitial Leydig cells in this case, into the bloodstream and travels through the circulatory system to reach its target cells. Endocrine signaling allows hormones to reach target cells that are far away from the site of production and to coordinate the function of cells and organs throughout the body.
Therefore, "a. Testosterone is a lipid-based steroid hormone which is involved in endocrine signaling" is the correct statement regarding testosterone.
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a hormone that is secreted from a cell is manufactured by ribosomes_____. a hormone that is secreted from a cell is manufactured by ribosomes_____. attached to the rough endoplasmic reticulum attached to the plasma membrane inside the nucleus attached to the golgi apparatus
The hormone secreted from a cell is manufactured by the ribosomes is (a) attached to the rough endoplasmic reticulum (RER).
Rough endoplasmic reticulum (RER) is one of the two types of endoplasmic reticulum. It is covered by ribosomes all over that are involved in the synthesis of proteins. The RER is attached in continuous with the membrane of the nucleus.
Hormones are the chemical messengers that are present in the blood stream, involved in regulating various body functions. Hormones can be made up of proteins, steroids, etc. The examples of hormones are: growth hormone, glucagon, luteinizing hormone, insulin, oxytocin, etc.
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Which of the following scenarios would lead to this type of natural selection graph?
Question 17 options:
the longest and shortest tailed squirrels are selected for
the most common butterfly wing pattern is selected for
all beetles of one color are selected for
a single mouse is born with a mutated fur color
According to experts who study squirrels, they can also fall from trees, get their tails trapped in the teeth of predators, or get hit by cars. genetic drift, natural selection mutation, and gene flow.
What circumstances will result in natural selection?Natural selection happens when people with a particular genotype have a higher chance of surviving, reproducing, and passing on her alleles to the following generation than individuals with a different genotype.
What examples of organic selection are there?The process through which species with better environmental adaptations endure and procreate more is known as natural selection. Natural selection is demonstrated by the increase in the proportion of moths following urbanization.
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All of the following statements describe the structure of the cervical, thoracic, and lumbar vertebrae exceptA. To protect the spinal cordB. They attach the thoracic vertebrae to the ribs.C. Their body consists of paired pedicles and laminae.D. They are located in the petrous part of the parietal bones.
D. They are located in the petrous part of the parietal bones.
The cervical, thoracic, and lumbar vertebrae are located in the spinal column, not in the petrous part of the parietal bones. The other three statements (A, B, and C) are correct and describe the structure of the cervical, thoracic, and lumbar vertebrae.
What is parietal bones?The parietal bones are a pair of flat bones located in the human skull, on either side of the cranial vault. They form the largest part of the skull's roof and contribute to the sides and top of the cranial cavity, which protects the brain. The parietal bones are connected to other bones in the skull, such as the frontal bone, the temporal bones, and the occipital bone, to form the cranial vault. In addition to protecting the brain, the parietal bones also play a role in supporting the skull and aiding in the transfer of weight from the skull to the spinal column.
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T/F protein a will bond to a repressor molecule, which will then bind to the dna strand, covering the promoter.
The given statement "Protein a will bond to a repressor molecule, which will then bind to the DNA strand, covering the promoter" is true because repressor molecules act by blocking DNA sequences like the promoter.
In molecular genetics, a repressor molecules can be basically defined as a DNA or an RNA-binding protein which basically inhibits the expression of one or more than one genes by binding to the operator or any other associated silencers.
A DNA-binding repressor would block the attachment of the RNA polymerase to the promoter and by this it will be able to prevent the transcription of the genes into mRNA whereas an RNA-binding repressor will bind to the mRNA and will happen to prevent the translation of that mRNA into protein. Thus, a repressor acts by blocking important DNA sequences like the promoter.
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For the cross in Part B, predict the frequencies of each of the phenotypes in the F1 progeny, and determine the genotype(s) present in each phenotypic class. Complete the diagram by dragging the correct label to the appropriate location. Labels can be used once, more than once, or not at all.
The multiplication rule is used to calculate the frequencies of the four phenotypic classes.
What does genetics' rule of multiplication entail?The probability of inheriting numerous, independently occurring genetic features simultaneously is determined by the product (or multiplication rule). By multiplying the odds for each genotype together, this likelihood is determined.
For instance, the likelihood of the green progeny's development depends on inheriting a y allele from both parents (probability = 12 x 12 = 14). They thus make up 14 of the total progeny.
Similar to the wrinkled children, which account for 12 of the total progeny because getting a r allele from both parents is necessary for their creation (probability = 1 x 12 = 12).
Apply the multiplication rule to determine their frequency because the [wrinkled, green] progeny are concurrently green and wrinkled and these events are independent: 14 x 12 = 1/8.
RrYY, RrYy, 3/8 (x2)
rrYY, rrYy, 3/8 (x2)
1/8 - Rryy
1/8 - rryy
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How does gel electrophoresis allow scientists to separate DNA samples based on their size? (Your answer must include the terms positive charge and negative charge!)
Answer
Gel electrophoresis and DNA
DNA is negatively charged, therefore, when an electric current is applied to the gel, DNA will migrate towards the positively charged electrode. Shorter strands of DNA move more quickly through the gel than longer strands resulting in the fragments being arranged in order of size.
the name of the secretion produced in the stomach that helps break down protein and activates pepsin is .
Does the cell shown have a cell wall, a cell membrane, or both? Explain your reasoning.
Answer:Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane. This gives the plant cell its unique rectangular shape.
Explanation:
35. (four marks) Illustrate the formation of sucrose from the reaction of a glucose molecule with a fructose molecule. glucose + fructose → 1
The formation of sucrose from the reaction of a glucose molecule with a fructose molecule is Molecule of fructose Glucose + Fructose ------> Molecule of sucrose
What happens when glucose and fructose react?Sugars like fructose and glucose can combine to form sucrose. A sugar that has one unit of fructose and one unit of glucose, sucrose is a disaccharide. A condensation reaction occurs when two molecules are joined together and a water molecule is released.
A glycosidic bond, which is a covalent bond between two monosaccharides, is created by this reaction between the two molecules. The following is the response:
The enzyme sucrase is responsible for initiating the glucose, fructose, sucrose, and water reaction. It helps break down sucrose for digestion and is found in the small intestine. A dehydration synthesis reaction, in which the two molecules join together and release water, is demonstrated by this reaction.
It is also an illustration of a condensation reaction, in which two molecules join together to release a small molecule like water.
The digestion of sucrose and other disaccharides like lactose and maltose is dependent on the fructose-glucose reaction. Additionally, the reaction has a significant impact on the energy production and carbohydrate metabolism.
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How does geological time help us understand the importance of fossils?
Answer:
Geological time provides context and a framework for understanding the significance of fossils. Fossils are the preserved remains or impressions of ancient organisms, and they provide important evidence for the evolution and diversification of life on Earth. Geological time, on the other hand, refers to the immense span of time over which Earth has existed and evolved, including the changes that have taken place in its rocks, continents, oceans, and atmosphere.
By dividing geological time into smaller units and placing fossils into this framework, we can understand when and where different species existed, how they evolved and adapted over time, and how they are related to one another. This helps us to reconstruct the history of life on Earth and to gain a better understanding of the processes that have shaped our planet and its diverse array of living organisms.
For example, studying fossils in rocks of different ages can help us to understand the evolutionary relationships between different groups of organisms and to trace the origins of major groups such as mammals, birds, and reptiles. This information provides valuable insights into the history of life on Earth, the evolution of its ecosystems, and the factors that have shaped the diversity of life we see today.
Progressive muscle relaxation is commonly defined as an interaction with the interior self that facilitates the relationship between mental and biological response. a. true b. false
True Progressive muscle relaxation is frequently described as an engagement with the inner self that supports the connection between the brain and the body.
What is the name of the stress-reduction method that involves the contraction and relaxation of muscular groups?One of the most basic and straightforward relaxation techniques is progressive muscle relaxation (PMR). The early 1920s saw the invention of this now-common practice by Dr. Edmund Jacobson.
What hormones are produced by the body to prime it for fast physical action?Your adrenal glands produce the hormone adrenaline (also known as epinephrine) to aid in your preparation for stressful or dangerous circumstances. The rapid release of adrenaline into your blood is known as an adrenaline rush. Your body begins to prepare for a "fight or flight" reaction as a result.
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which of the following are functions of membranes? group of answer choices cell-cell communication regulation of transport compartmentalization define cell boundaries all of the these
Answer:
the answer is All of these.
se In addition to the p53 gene, another gene on chromosome 17 has been linked to the predisposition to skin cancer. The mutated version of this gene produces the phenotype of increased risk of having skin cancer. The diagrams above track chromosome pair #17 through the process of melosis for a male and a female. These parents are both heterozygous for this gene. Q22: Using the letters A/a, illustrate how these two individuals pass on their allele combinations to their offspring in the Punnett Square at the right. Genotype % in offspring: Phenotype % in offspring: Q23: Circle any offspring in the Punnett Square who are homozygous for this increased skin cancer risk. Q27: Can the mother and father above produce children with no increased risk for this cancer? (Circle one) YES NO Q28: Provide evidence to support your claim here.
Answer:
Unfortunately, I cannot create a Punnett Square without additional information. However, I can explain the concept of a Punnett Square and how it relates to genetic inheritance.
A Punnett Square is a diagram used to predict the expected ratio of offspring genotypes resulting from a genetic cross. In the Punnett Square, each parent's alleles are represented on the top and left side of the square, and the resulting offspring genotypes are listed in the boxes inside the square.
In the given scenario, the parents are both heterozygous for a gene that is linked to skin cancer, meaning they have one normal allele (a) and one mutated allele (A) for this gene. To create a Punnett Square, each parent's alleles are written on the top and left side of the square and then combined to predict the expected offspring genotypes.
In the offspring, there is a 50% chance of inheriting either A or a from each parent. If an offspring inherits A from one parent and a from the other, the offspring would be heterozygous and have an increased risk of skin cancer. If an offspring inherits two a alleles, the offspring would have no increased risk of skin cancer.
Therefore, the answer to Q27 is YES, the mother and father can produce children with no increased risk for this cancer. This is because the offspring can inherit two a alleles, which do not carry the increased risk of skin cancer. This is the evidence to support the claim.
on a cladogram representing genetic evolutionary relationships of the plant groups, the evolution of separates the angiosperms and gymnosperms from the other groups of plants
An illustration of a possible relationship between groups of species, including their shared ancestors, is called a cladogram. Gymnosperms and angiosperms differ primarily in how their seeds are made.
How can cladograms depict relationships in evolution?
Cladograms are used by scientists to make suggestions and pose queries regarding the evolutionary relationships between various species. by emphasising derived characters and taking into account ancestor traits.
What are the relationships between plants in evolution?
From the first algal mats to multicellular marine and freshwater green algae, the development of plants has produced a vast variety of complexity.
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which of the following scenarios would cause a peritrichously flagellated bacterium (like e. coli) to swim in a forward motion? choose one: A. all flagella turning clockwise
B. all flagella turning counterclockwise
C. rotation of the flagella (direction doesn't matter) on only the "back" half of the bacterium
D. 50% or more of the flagella rotating clockwise
E. 50% or more of the flagella rotating counterclockwise
A peritrichously flagellated bacterium like E. coli will swim in a forward motion when 50% or more of its flagella are rotating counterclockwise.
What is bacteria?Bacteria are single-celled creatures that are tiny in size. Bacteria may be found practically wherever on the earth and are essential to the planet's ecosystems. Some animals can survive in severe temperatures and pressures. The human body is teeming with germs, and it is thought that bacterial cells outnumber human cells.
Here,
Bacteria like E. coli are covered with many flagella that help them move through their environment. In a peritrichously flagellated bacterium, the flagella are located all around the cell, rather than in a single bundle or at one end of the cell. When all of the flagella are rotating in the same direction, the bacterium will move in a straight line. However, if half or more of the flagella are rotating in the opposite direction, the bacterium will move in a circular motion or tumble, and change direction.
In order for the bacterium to swim in a forward motion, 50% or more of the flagella must be rotating counterclockwise, causing a "paddle-like" movement that propels the bacterium forward. This type of coordinated flagellar movement is regulated by complex signaling pathways and motor proteins within the bacterium.
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Which characteristic would a taxonomist use to classify organisms as Archaebacteria or as Eubacteria?
A.) The Internal organization of the cell.
B.)The number of cells in an individual.
C.) The composition of the cell wall.
D.) The nutritional requirements of the organisms.
Electron carriers used in electron transport chains are always found in membranes. Which one of the following statements is NOT a reason why electron transport chains are found in membranes?
The following statement is not a reason why electron transport chains are found in membranes is so that they can transport NADH out of the cell to the periplasm.
Thus, the correct answer is so that they can transport NADH out of the cell to the periplasm (C).
The electron trаnsport chаin is а series of four protein complexes thаt couple redox reаctions, creаting аn electrochemicаl grаdient thаt leаds to the creаtion of АTP in а complete system nаmed oxidаtive phosphorylаtion. It occurs in mitochondriа in both cellulаr respirаtion аnd photosynthesis. In the former, the electrons come from breаking down orgаnic molecules, аnd energy is releаsed. In the lаtter, the electrons enter the chаin аfter being excited by light, аnd the energy releаsed is used to build cаrbohydrаtes.
Your question is incomplete, but most probably your options were
A. so that the electron carriers can be oriented within the membrane such that protons are passed from one side of the membrane to the other
B. so that they can effectively pass electrons in sequence from the carriers with the more negative reduction potentials to those with the more positive reduction potentials
C. so that they can transport NADH out of the cell to the periplasm
D. so that the electron only carriers can be arranged to alternate with electron plus protein carriers in the chain
Thus, the correct option is C.
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People who engage in extreme sports often do so to feel the rush of epinephrine and norepinephrine. This hormone rush comes from the _____ glands.
People who engage in extreme sports often do so to feel the rush of epinephrine and norepinephrine. This hormone rush comes from the adrenaline rush glands.
Extreme sports are popular among those who want to experience the rush of hormones. The thrill they experience from the chemicals adrenaline and norepinephrine is caused by: brain networks. adrenal glands. Extreme sports enthusiasts frequently do so to experience the surge of adrenaline and norepinephrine.
Some folks appreciate the buzz that adrenaline provides. They may choose to engage in intense sports or activities in order to deliberately release adrenaline into their bodies.
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1. Variation in human skin color is a result of
a. incomplete dominance.
b. codominance.
c. polygenic traits.
d. multiple alleles.
A unique gene interaction known as incomplete dominance occurs when a dominant allele is unable to completely suppress the expression of a recessive allele. Skin tone is controlled by several genes.
What causes diversity in the colour of human skin?Variation in pigmentation, which is brought on by genetics (inherited from one's biological parents and/or specific gene alleles), exposure to the sun, natural and sexual selection, or any combination of these, is what gives people their different skin tones.
What kind of fluctuation in skin tone is typical?The range of normal skin tones includes white, pink, yellow, brown, and black. Skin, head hair, and body hair clearly differ between the various ethnic groups.
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Which statement is correct about the function of a pseudopod?
The functions of pseudopodia include locomotion and ingestion.
What is the function of the pseudopod?Pseudopodia are critical in discerning targets that can then be engulfed; the engulfing pseudopodia are called phagocytosis pseudopodia. A usual example of this type of amoeboid cell is the macrophage. Pseudopods have two main functions: (1) locomotion and (2) capture of prey or inundation of food. The pseudopod bulges outward from the edge of the cell to pull in the whole organism as it goes forward.
Movement authorizes an organism to change its form or function shape. This is attained using pseudopods. Protists, such as the amoeba, use pseudopods to obtain nutrients or to get rid of waste.
So we can conclude that Pseudopodia are interim projections of the cytoplasm of a cell.
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André is starting to notice facial hair and hair under his arms. His voice also seems to be deepening. He is noticing changes in _____ sex characteristics.
secondary sex characteristics. Adolescents may worry and worry about being different from their friends due to voice changes, wet dreams, involuntary erections.
The prefrontal cortex experiences an increase in myelination and synaptic pruning during adolescence, which boosts the efficiency of information processing and strengthens the neural connections between the prefrontal cortex and other parts of the brain. Precocious puberty can come in three different forms for children: central precocious puberty, which is the most prevalent variety, peripheral precocious puberty, and incomplete puberty. Precocious puberty in the centre: The premature release of sex hormones causes central precocious puberty.
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How is cellular respiration related to photosynthesis?
Multiple Choice
both break down glucose for energy
both build glucose to store energy from the sun
both reactions release carbon dioxide
Seved
Photosynthesis produces glucose using energy from the sun while cell respiration produces oxygen from glucose.
Photosynthesis produces alucose usina enerav from the sun while cell respiration breaks down alucose to release energy
Photosynthesis makes glucose which is used in cellular respiration for making ATP.
How does cellular respiration lead to photosynthesis?Photosynthesis transform carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-effect. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products and ATP is energy that is transformed from the procedure.
The glucose is then transformed back into carbon dioxide, which is used in photosynthesis. The glucose is then changed back into carbon dioxide, which is used in photosynthesis. Cellular respiration is how animals together glucose and oxygen to produce carbon dioxide and water
So we can conclude that Respiration and photosynthesis are biological reactions in the environment that companion each other.
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rank the levels of organization from least inclusive (smallest) to most inclusive (largest), beginning with the least inclusive at the top of the list and the most inclusive at the bottom of the list.
Answer:organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere
Explanation:organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere
In levels of organization, cells form tissues, tissues become organs, organs become organ systems, and several organ systems combine to produce a single organism.
Thus, the basic units of life and the simplest degree of organization, cells serve as the foundation for all living things. Tissues are collections of cells that collaborate to carry out particular tasks. Organs are multi-tissue structures that collaborate to perform particular tasks for an organism.
Organ systems are made up of several organs that work together to carry out greater tasks essential to an organism's existence. An individual living being made up of a variety of organ systems and capable of undergoing the processes of life is referred to as an organism.
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characteristics that define archaea, however, include the presence of a cell wall, but its structure is not composed of ______ like that of the members of domain ______.
Characteristics that define archaea, however, include the presence of unique membrane lipids, cell wall construction and composition and metabolic pathways.
Long before multicellular life developed on Earth, there existed bacteria and Archaean. They are everywhere around us and engage in a wide range of metabolic processes. Because of this diversity, various species within clades can live on any surface where there is enough moisture.
While bacterial phospholipids are made up of straight fatty acids coupled by ester bonds to the enantiomeric glycerol-3-phosphate backbone, archaeal lipids are made up of highly methylated isoprenoid chains that are ether-linked to a glycerol-1-phosphate backbone.
There are numerous metabolic pathways found in the Archaea that are not the well-known classical pathways. Modified variants of the Embden-Meyerhof and Entner-Doudoroff pathways carry out glycolysis.
The question is incomplete, it should be:
Characteristics that define archaea, however, include the presence of unique membrane ________, _________ construction and composition and _______ pathways.
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Which of the following is commonly NOT found in the leaves of plants in the rainforest that helps them deal with the heavy rains that they encounter?
-taking up water through leaf pores
-having pointed leaf tips
-having gutters
-having dense hairs on the leaves
-being tough
The correct answer is: taking up water through leaf pores.
What is a leaf?
A leaf is the main stem appendage of a vascular plant. It is designed specifically for photosynthesis and is typically borne laterally above ground. As in "fall foliage," leaves are referred to collectively as foliage, whereas the shoot system is made up of the leaves, stem, blossom, and fruit.Palisade mesophyll, which is typically found on the upper side of the blade or lamina of the leaf, is the primary photosynthetic tissue in most leaves. However, in some species, such as the mature foliage of Eucalyptus, palisade mesophyll is present on both sides, and the leaves are referred to as isobilateral. The majority of leaves are flattened, with distinct upper (adaxial) and lower (abaxial) surfaces that vary in color, hairiness, number of stomata (pores that take in and output gases), amount, and structure of chlorophyll, and other properties.To know more about leaves, click the link given below:
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the cell wall component of a gram negative bacterium that can exhibit toxicity and cause fevers if the bacterium is inside you is the ______
The cell wall component of a gram negative bacterium that can exhibit toxicity and cause fevers if the bacterium is inside you is the endotoxin.
Endotoxins are basically the glycolipid and the lipopolysaccharide or the LPS macromolecules which make up about the 75% of the outer membrane present in the gram-negative bacteria and these are capable of causing lethal shock to humans.
The structure of lipopolysaccharide basically consists of a hydrophobic lipid A domain, the outermost O-antigen polysaccharide and an oligosaccharide core. Endotoxins present on the gram-negative bacteria can cause changes in blood pressure, fever, inflammation, lethal shock, and a lot of other toxic events.
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