The hypothalamus has neurosecretory neurons that produce the hormone GnRH . In response, the anterior pituitary releases two hormones known as FSH and LH.
What is GnRH ,FSH and LH?The pituitary gland in the brain produces and secretes the hormones luteinizing hormone (LH) and follicle-stimulating hormone(FSH) in response to gonadotropin-releasing hormone (GnRH). These hormones stimulate the production of testosterone in men's testicles. They induce the production of estrogen and progesterone by the ovaries in females.
LH, or luteinizing hormone, is essential for gonadal function. Follicular development and ovulation are stimulated by LH working in concert with follicle stimulating hormone (FSH). Thus, the combined effects of FSH and LH lead to proper follicular development.
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some hydrogen oxidizers synthesize two forms of the enzyme hydrogenase, one that is embedded in the cytoplasmic membrane and one that is soluble in the cytoplasm. other hydrogen oxidizers get by with only one form of hydrogenase. given the roles of each type of hydrogenase, what are the implications for the latter type of organism?
Organisms that only have one form of hydrogenase likely have limited ability to control the rate of hydrogen oxidation and utilization compared to organisms that have both forms of hydrogenase.
The soluble form of hydrogenase can rapidly scavenge hydrogen gas, while the membrane-bound form can regulate the rate of hydrogen uptake and ensure the proper balance of reducing equivalents within the cell. The synergist site on the catalyst gives basic hydrogen-processing microorganisms a redox component by which to store and use energy by means of the response displayed . This is especially fundamental for the anaerobic, sulfate-lessening microorganisms of the family Desulfovibrio as well as pathogenic organic entities. Escherichia coli and Helicobacter pylori.
The systems, development, and capability of [NiFe] hydrogenases are effectively being explored for applications to the hydrogen economy and as likely anti-toxin targets.The organism with only one form of hydrogenase may have difficulty adapting to changes in hydrogen availability and may be less efficient in utilizing hydrogen as a source of energy.
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Plants grow in two very different ways. each type of growth is accomplished by specific types of cells, in specific areas of the plant, and for specific purposes. Place the terms on the left to the appropriate blanks on the right to complete the sentences. terms may be used once, more than once, or not at all.1. Primary growth is the method by which roots and shoots are elongated in all vascular plants.2. Secondary growth is the method by which woody plants grow in thickness.3. Secondary growth is accomplished by two cylinders of dividing cells called lateral meristems.4. Primary growth is accomplished by groups of undifferentiated cells at the tips of the roots and shoots called apical meristems.5. The majority of growth in width is due to increases in the number of cells added by the vascular cambium.
.1. Primary growth is the method by which roots and shoots are elongated in all vascular plants.2. Secondary growth is the method by which woody plants grow in thickness.3. Secondary growth is accomplished by two cylinders of dividing cells called lateral meristems.4. Primary growth is accomplished by groups of undifferentiated cells at the tips of the roots and shoots called apical meristems.5. The majority of growth in width is due to increases in the number of cells added by the vascular cambium.
The phases of growth in plants, or the two separate stages of plant growth, are recognised. The definition of plant growth claims that it is the expansion of a plant's mass or volume. This occurs during the growth and/or reproduction of cells, organs, and tissues. Primary and secondary growth phases are the two stages of a plant's life cycle. Each stage is a sort of growth that takes place at various times throughout the plant's life, whether it be vertical or horizontal. In these stages, a plant doesn't cease growing; instead, it keeps expanding until it dies. The term "indeterminate growth" refers to this process.
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In general, a signal transmitted via phosphorylation of a series of proteins requires thatOA) the ligand be passed along a series of proteins.OB) ATP is inactivated at each step.OC) the series of proteins are all activated at the same time.OD) the proteins are sequentially activated and inactivated.OE) All of the above are true.
In sequential phosporylation, also renowned as the excitation cascade, proteins are first orderedly activated before ever being deactivated to make room for the ensuing reaction.
What function does protein serve?Protein is inherent in human cell. An amino acid chain make up the fundamental block of proteins. In order for your body to fix broken cells and create new ones, you need high - quality protein. Children, teenagers, and expecting women all need protein for growth and development.
What fruit contains the most protein?Guava. One of the fruits with the largest protein content is the guava. Every cup contains a staggering 4.2 grains of the substance. The tropical mango is also a good source of fiber and vitamin C.
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microscopic membrane extensions that extend from the plasma membrane are called?
Microscopic membrane extensions extending from the plasma membrane are called cilia.
Cilia, multiple cilia, are membrane-bound organelles found in most types of eukaryotic cells and certain microorganisms known as ciliates. Cilia are absent in bacteria and archaea. Cilia are in the form of thin threadlike projections extending from the surface of the much larger cell body. The function of cilia is to move water relative to the cell with normal ciliary movements. This process results in the movement of the cell through water, typical of many unicellular organisms, or the movement of water and its contents across the surface of the cell.
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j. w. tutt proposed that ..... colored peppered moths were more visible to predators on trees without lichens. in contrast, the forms were camouflaged on sooty trees without lichens.
J. W. Tutt proposed that light colored peppered moths were more visible to predators on trees without lichens. in contrast, the forms were camouflaged on sooty trees without lichens.
This is also referred to as cryptic coloration and it is known as a defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings.
Light colored organisms usually appear more visible to predators on trees without lichens while the forms were camouflaged which means hardly seen on sooty trees without lichens thereby making it the correct choice.
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What receives the signal at a synapse in the nervous system?
Answer:
Dendrites
Explanation:
Synapse contains two main parts:
Axons: they bring information and are at the end of a neuron
Dendrites: they are at the beginning of a neuron and receive nerve signals.
briefly explain how an increase in genetic variation (in the next generation) is achieved in sexually reproducing species. what two events specifically lead to this genetic diversity?
An increase in genetic variation in the next generation of sexually reproducing species is achieved through the process of meiosis and fertilization.
Meiosis: During meiosis, the chromosomes in the parent's cells are shuffled and divided into new cells called gametes (sperm or eggs). This shuffling creates new combinations of genes that can be passed on to the offspring. Fertilization: When sperm and egg cells unite during fertilization, they form a zygote with a unique combination of genetic material from both parents. This mixing of genetic material contributes to the genetic diversity in the next generation.These two events, meiosis and fertilization, increase genetic diversity in the next generation by creating new combinations of genetic material that can be passed down. This genetic diversity provides the basis for evolution and adaptation, allowing species to better respond to changes in their environment.
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What is the hormone that plays a vital role in the male reproductive system?
The male reproductive system depends heavily on the testosterone hormone.
When it comes to the male reproductive system, hormones are crucial. They control men's sex desires and have an impact on their reproductive capacities. Men's hormones tend to remain relatively stable from the onset of adolescence until well into their reproductive years, in contrast to women who experience cyclical hormonal release and changes according to their menstrual cycle.
Testosterone is arguably the most well-known hormone in the male reproductive system. The testicular Leydig (interstitial) cells create around 95% of the testosterone, with the remaining 5% coming from the adrenal glands. Testosterone is the most significant hormone among FSH, LH, and others. It is crucial for normal growth and development, including the growth of the body, facial hair, laryngeal functions that affect voice changes during puberty, the enlargement of the genitalia, and secondary sex traits in males.
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blood capillaries that supply the epidermis are located in the
Blood capillaries found in the upper layer of the dermis instead provide nutrients to cells in the deeper layers of the epidermis, which lacks blood vessels.
What does the skin's epidermis mean?The topmost layer of skin in your body is called the epidermis. It defends your body from damage, keeps you hydrated, regenerates skin cells, and includes melanin, which gives your skin its color.
What does a cell's epidermis look like?The epidermis is the top layer and varies in thickness from 0.05 to 1 mm depending on the body part. The epidermis is mostly made up of keratinocytes, keratinocytes, and Langerhans cells.
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gene flow _____ the genetic variation between two populations.
Gene flow refers to the exchange of genetic material between populations.
It is a process that can increase the genetic variation between two populations. When individuals move from one population to another, they bring their unique genetic makeup with them, increasing the diversity of the recipient population. This can result in the introduction of new alleles, or variations of a particular gene, into the population, increasing the overall genetic variation. Conversely, when individuals from the recipient population move to the original population, they can also introduce new genetic material, further increasing the genetic variation between the two populations. Gene flow helps to counteract the effects of genetic drift, which is a random change in the frequency of alleles in a population, and can increase the adaptation potential of populations to changing environments. The level of gene flow between populations is influenced by various factors such as geographical distance, migration patterns, and cultural and behavioral barriers.
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which is not a function of blood? answer unselected thermoregulation unselected protects from infection unselected transports wastes unselected regulates ph unselected stores calcium
Thermoregulation is not a function of blood.
What is thermoregulation?
Thermoregulation is a function of the body generally, not just of blood. The body uses its circulatory system, including the blood, to help regulate temperature. It is a homeostatic process, and is usually achieved by a combination of behavioral and physiological mechanisms. Behaviorally, organisms may move to areas of optimal temperature or adjust their metabolic rate. Physiologically, organisms have various adaptations to help them regulate their body temperature, such as sweating, panting, and the production of brown fat. Correct thermoregulation is essential for the survival and normal functioning of many organisms.
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which part of the fluorescence microscope will you adjust to direct the appropriate excitation wavelengths at your specimen?
The dichromatic beam-splitters of the fluorescence microscope will be adjusted so that your specimen receives the proper excitation wavelengths.
As reflected light from the fluorescence illuminator enters the cube through the fluorescence illuminator, it is split into two directions by two dichromatic beam-splitters that are positioned 45 degrees apart. The chosen excitation light, which has shorter wavelengths, is guided by them through the objective and onto the specimen. To be observed under a fluorescence microscope, the sample must first be labelled with fluorescent dyes or other substances referred to as fluorophores.
Dichroic mirrors are a particular kind of filter that are designed to efficiently reflect excitation wavelengths while permitting passage of emission wavelengths. They are employed in reflected light fluorescence illuminators and placed in the light path after the exciter filter but before the barrier filter.
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What things are created from osteoblasts into compact or spongy forms of long, short, flat or irregular shapes which meet at joints or articulationsWhat
Bones are created from osteoblasts into compact or spongy forms of long, short, flat, or irregular shapes which meet at joints or articulations.
A solid body tissue known as bone, bone is made up of cells that are encased in an abundant amount of hard intercellular substance. Collagen and calcium phosphate are the two primary constituents of this material, and they are what set bone apart from other types of hard tissues, such as chitin, enamel, and shell.
The structure and support of the body, as well as protection for certain organs, are all provided by bone. Additionally, bone acts as a repository for minerals and supplies the medium (the marrow) that is necessary for the formation of blood cells as well as their storage.
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Is a general increase in the bulk of a body part or organ that is due to an increase in the size of cells in the tissues?
Hypertrophy is a general increase in the bulk of a body part or organ that is due to an increase in the size of cells.
When parenchymal cells are injured or destroyed, hypertrophy may arise as a compensatory reaction. For example, after a myocardial infarction, cardiac myocytes cannot undergo hyperplasia to replace damaged muscle fibers, but remaining myocytes increase (hypertrophy) to compensate for part of the function of the lost myofibers.
Most types of hypertrophy are significantly more complicated than a simple increase in cell size (e.g., hypertrophy of cardiac myocytes is associated with changes in the pattern of gene expression that result in the reactivation of embryonic genes and alter the structure of contractile proteins and modify the density of hormone receptors).
Many other ocular tissues undergo hypertrophy as a precursor to replication, such as iris endothelial hypertrophy prior to the development of a preiridal fibrovascular membrane, corneal stromal fibroblast hypertrophy in the early stages of stromal repair, and lens epithelial hypertrophy at various stages of cataract formation.
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Oceans in particular are experiencing tremendous changes due to the effects of human activity. Identify whether or not these human activities have a direct impact on oceanic life.Has a Direct Impact on Oceanic Lifegarbage disposaluse of fertilizer for agricultureoffshore oil drillingDoes Not Have a Direct Impact on Oceanic Lifeaccelerated sense of time
Human activities have a direct impact on oceanic life.
Garbage disposal: The ocean receives much of the waste generated by humans, which can harm marine animals, birds and plants.
Use of fertilizer for agriculture: The fertilizer runoff contains excess nitrogen and phosphorus that enter the ocean, leading to algal blooms that consume large amounts of oxygen, making it difficult for other marine species to survive.
Offshore oil drilling: Oil spills can harm marine animals and plants and disrupt their ecosystems, making it difficult for them to survive and reproduce.
Accelerated sense of time does not have a direct impact on oceanic life.
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scientists have found that dna methylation suppresses crossing-over in the fungus ascobolus immersus. which of the following questions is most appropriately raised by this specific observation? responses is the level of genetic variation in the gametes related to the amount of dna methylation observed? is the level of genetic variation in the gametes related to the amount of d n a methylation observed? without crossing-over, will gametes be viable and be able to produce zygotes? without crossing-over, will gametes be viable and be able to produce zygotes? does dna methylation result in shorter chromosomes? does d n a methylation result in shorter chromosomes? is this species of fungus a diploid organism?
The question is the level of genetic variation in the gametes related to the amount of DNA methylation observed? is the most appropriate question raised by this observation. So, the correct option is B.
What is Epigenetics?Epigenetics is defined as all changes in gene expression that are not linked to DNA (nucleotide) sequence. Epigenetic modifications include DNA methylation, histone modifications such as acetylation methylation, etc., and regulatory non-coding RNA pathways.
Variation in DNA methylation patterns may be associated with repression (or activation) of gene expression.
Therefore, the correct option is B.
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which process involves the diffusion of protons across the mitochondrial membrane
Chemiosmosis process involves the diffusion of protons across the mitochondrial membrane.
What is mitochondria?The cytoplasm of eukaryotic cells contains tiny organelles called mitochondria, which resemble beans. Because they are essential for the cellular energy production process, they are frequently referred to as the "powerhouses" of the cell.
Oxidative phosphorylation is the name given to the process in which protons diffuse through the mitochondrial membrane.
This is the method by which cells convert the energy created by the oxidation of food molecules into ATP, the main kind of energy used by the cell. A proton gradient is produced when protons are pushed from the mitochondrial matrix to the intermembrane space during oxidative phosphorylation. The ATP synthase enzyme complex harnesses the energy from the proton gradient to synthesis ATP, allowing the protons to diffuse back into the matrix once more.
All living things depend on the process of oxidative phosphorylation to produce the energy needed for cellular activity.
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Complete question:
Which process involves the diffusion of protons across the mitochondrial membrane:
aerobic process
phosphorylation
Chemiosmosis
ETC process
what color do you expect an e. coli colony to be if the bacterium contained a recombinant plasmid of pgem plus and chdna insert?
If an E. coli colony had a recombinant plasmid of pgem plus and chdna insert, we would anticipate it to be white in color.
Because DNA molecules are introduced into cells with a high degree of efficiency in E. coli, this organism is a favorite host for gene cloning. Due to its quick growth and capacity for extremely high protein expression, E. coli is a favoured host for the manufacture of proteins.
Sanger sequencing is the most precise method of verifying your recombinant colonies. The first step is to separate the plasmid DNA from an overnight bacterial growth. When everything is finished, the insert can be located using sequencing primers designed for the chosen vector.
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which of the statements can be concluded from gregor mendel's experiments with pea plants? offspring inherit two alleles per gene from each parent. when a homozygous dominant parent is crossed with a homozygous recessive parent, 50% of the offspring have a dominant phenotype. two recessive alleles are necessary for a recessive phenotype. alleles of different genes are inherited independently of each other.
All of the statements can be concluded from Gregor Mendel's experiments with pea plants.
what are Gregor Mendel's experiments?
Gregor Mendel studied the inheritance patterns in pea plants through a series of experiments. He decided to study pea plants because of their rapid reproduction and distinctive differences in traits including blossom color, seed color, and form.
Mendel created hybrid pea plants by breeding pea plants with various features, such as tall and short, smooth and wrinkled, or purple and white blooms.
F1 and F2 generations, as well as inheritance laws: Mendel developed the Law of Segregation and the Law of Dominance, two inheritance laws, based on the findings of his research.
The contemporary understanding of genetics and the generational transmission of hereditary features was developed in large part as a result of Mendel's experiments.
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A nonscientific synonym for disease-producing organisms is known as ______.A. AntisepticB. InfectionC. GermD. Fungicide
Answer:germs
Explanation:
Why are producers important in the environment?
Answer:
they aren't
Explanation:
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Which theory states that all organisms are made up of cells that are capable of self-reproduction and come only from preexisting living cells?
The theory that states that all organisms are made up of cells that are capable of self-reproduction and come only from preexisting living cells is called the Cell Theory.
The Cell Theory was first proposed by German biologists Matthias Schleiden and Theodor Schwann in the mid-19th century and is one of the most fundamental principles of biology. It states that all living organisms, from single-celled bacteria to complex multicellular organisms like humans, are made up of cells. Furthermore, the theory states that cells are the basic unit of life and that new cells can only be produced from existing cells through the process of cell division. The Cell Theory has revolutionized our understanding of the structure and function of living organisms and remains one of the central pillars of modern biology.
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According to the phylogeny of various plant species depicted here, which species is the most recent common ancestor of species K and J?
According to the phylogeny of various plant species depicted here, species D is the most recent common ancestor of species K and J.
A phylogenetic tree, also called a phylogeny, is a diagram that shows the evolutionary branches from which various species, creatures, or genes have descended from one another. Phylogenies are helpful for classifying organisms, organizing knowledge of biological diversity, and shedding light on evolutionary processes. Furthermore, one needs to comprehend phylogenies in order to fully appreciate the overwhelming evidence in favor of evolution since these trees demonstrate descent from a common ancestor and since common ancestry constitutes most of the strongest evidence for evolution.
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true or false: although it was once thought that bacteria were the causative agent of most peptic ulcers, new evidence suggests that ulcers are usually caused by irritation to the gastrointestinal tract and that bacteria are only rarely involved.
It is false that "bacteria were the causative agent of most peptic ulcers, new evidence suggests that ulcers are usually caused by irritation to the gastrointestinal tract and that bacteria are only rarely involved." because bacteria have been found to be as causative agent of ulcers,
Peptic ulcers are basically open sores which happen to develop on the inside of the lining of our stomach and even the upper portion of your small intestine. Ulcers occur basically when the stomach acid damages the lining of the human digestive tract. Another common cause of ulcers are anti-inflammatory pain relievers including aspirin.
Bacteria have only very relatively recently been described as a causative agent of peptic ulcers, and new evidence also suggests that the bacterium Helicobacter pylori is somewhat involved in the majority of these cases.
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when predicting the phenotypic ratio of a crossing between two heterozygous corn plants (ppss), the ratio was shown to be 9:3:3:1. what would the phenotypic ratio be if we crossed two homozygous corn plants, with one homozygous dominant for both color and texture (ppss) and the other homozygous recessive for both traits (ppss)?
If we crossed 2 homozygous corn plants, one homozygous dominant both for texture and color (PPSS) and the other recessive allele for both traits, the phenotypic ratio would be 1:1:0:0:0. (ppss).
It was determined that the ratio of a hybrid among two heterozygous flies was 9:3:3:1.
In a cross among two heterozygotes, the phenotypic ratio is 9:3:3:1, meaning that 9/16 of the offspring have the dominant phenotype both for characteristics, 3/16 have the dominant phenotype with one feature, 3/16 have the dominant phenotypic for the remaining characteristic, and 1/16 have the recessive phenotype.
A testcross to the a heterozygous person should always result in a proportion of the dominant and recessive phenotypes that is close to 1:1. The genotypic to phenotypic ratio in this case is therefore 50/50.
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Arthropods are the most numerous animals on Earth. Which of the following traits probably made the smallest contribution to their success?A. A rigid exoskeletonB. Color of the exoskeletonC. Waterproofing by chitinD. Jointed appendagesE. Specialization of different appendages
Arthropods are the most numerous animals on Earth and the traits which probably made the smallest contribution to their success is option E. Specialization of different appendages
Invertebrate creatures known as arthropods have a striated appearance, an exoskeleton, and paired jointed legs. The phylum Arthropoda is made up of arthropods. They can be identified by their joined limbs and chitin-based cuticle, which is frequently mineralized with calcium carbonate.
The arthropods' extraordinary adaptability and success is the reason for their great diversity. Arthropods may be found in almost every environment and niche on earth because to the evolution of a wide variety of appendages, including antennae, claws, wings, and mouthparts.
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some important traits that influence the reproductive success of a flower include: the presence or absence of
Some important traits that influence the reproductive success of a flower include the presence or absence of the presence or absence of whorls, the fusion of organs to one another, and the overall symmetry of flowers.
Each bloom has four whorls. Calyx, corolla, androecium, and gynoecium are the four of them.
A whorl often referred to as a vertical in biology, is a configuration of sepals, leaves, petals, carpels, or stamens that radiate from a central point and wrap around the stalk or stem. At least three parts make to a whorl of leaves.
A whorl or vertical is a radial pattern of leaves, sepals, petals, stamens, or carpels that surrounds or wraps around the stem or stalk in botany.
Sepals make up the calyx, which is the flower's outermost whorl. The corolla, which consists of petals, is contained within the calyx.
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if the implant is completely covered by soft tissue and requires a second procedure to uncover for crown placement it is called submerged. group of answer choices true false
Starting at the middle of the cover screw, you move the diode laser in a circular manner to the edges of the implant platform until the implant is exposed.
This method is a little more forgiving because you can self-correct if your aim is a little off but still on the implant. To hold and support the crown, bridge, or denture repair, the abutment, often referred to as a connector, is affixed to the top of the dental implant. In order to expose the implant and attach the abutment to the implant, the gum tissue is opened during the visit. Your braces are connected to this chain, which will gradually pull the tooth into the right position.
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In which order does water pass through these tissues in a plant?
Answer:
Water enters the plant through the root hairs. It is then conducted upward in the stem via the xylem. Water exits the plant through the stomata located on the leaves.
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Furthermore, the highest root pressures occur in the spring, but water moves through the xylem most rapidly in the summer (when transpiration is high).
Explanation:
Hope this helped!
Answer:
The water first enters the mesophyll cells from the xylem vessels tops. The water in the cells in the leaf then evaporates into the gaps between the cells. After then, water diffuses through stomata and leaves the leaf (as well as the entire plant).
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Explanation:
pseudostratified cuboidal epithelium: a. aids in digestion. b. is not an epithelial classification. c. possesses numerous goblet cells. d. lines the respiratory tract. 2 points
Option D is correct - d. lines the respiratory tract. Columnar epithelial cells make up the pseudostratified epithelium. It is uncommon for the cuboidal or squamous cells that make it up to be present.
A simple epithelium is a pseudostratified epithelium. However, the tissue appears to be stratified due to the orientation of the epithelial cells along the basement membrane. The arrangement of the epithelial cells gives the impression that the cells are different heights, but they are all roughly the same height. The nuclei are distributed at various levels because the cells are too crowded.
The stratified epithelium is made up of multiple layers of epithelial cells, in contrast to the simple epithelium's single layer of epithelial cells. Pseudostratified epithelium is a specific kind of epithelium, though.
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