The false statement is that birds are ancestors of dinosaurs.
The four main groups of living reptiles are dinosaurs, crocodilians, lizards/snakes, and turtles/tortoises. The next two groups are made up of the highly specialized archosaurs, which have existed for 225 million years! The living reptiles that are most similar to birds are called archosaurs.
Crocodiles and birds are most closely linked. Therapsids, a group of reptiles, split off about 40 million years later (very swiftly by geological standards), evolving into modern mammals. Over the subsequent 120 million years, many reptile species diverged, and the dinosaurs, one of these branches, flourished. However, all dinosaurs perished 65 million years ago, with the exception of a small type of feathered dinosaurs. Over the ensuing 65 million years, these transformed into modern birds. Birds are therefore not simply closely related to dinosaurs; they are dinosaurs themselves!
Hence, dinosaur are ancestors of birds
Turtles and crocodiles are all part of the clade known as reptiles. Based on the phylogenetic tree to the right, which statement(s) is FALSE?
A) Birds are reptiles.
B) Birds are ancestors of dinosaurs.
C) Birds are more evolved than turtles.
1) A, B, and C
2) B and C
3) A only
4) B only
5) C only
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chloroplasts were only examined and labeled in the spirogyra slide. relate the function of these organelles to explain why they were not present in the onion root tip slide.
The onion fruiting body (bulb), which is utilized for storing energy rather than photosynthesis, is the reason why the clear epidermal cells are found in a single layer and lack chloroplasts.
A big vacuole, cytoplasm, cell wall, cell membrane, and nucleus are all components of a plant cell. Because they are underground, the roots are shielded from the sun. As a result, they are independent of chloroplasts. Organelles found in plant cells called chloroplasts use the photosynthetic process to change light energy into relatively stable chemical energy. They ensure that life on Earth continues.
The two membranes that surround chloroplasts also include a third complex membrane system called the thylakoids, which includes grana and lamellae. In addition, key chloroplast structures include starch grains, plastoglobules, stromules, eyespots, pyrenoids, etc. It is largely agreed that a free-living, photosynthetic cyanobacterium gave rise to chloroplasts before being absorbed by a eukaryotic cell. The majority of the chloroplast proteins are encoded by nuclear genes, and the gene products are carried into the chloroplast through complicated import machinery. Chloroplasts retain a limited genome. The biogenesis and dynamic three-dimensional structure of chloroplasts depend on these activities.
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describe three cranial features that differentiate the robust australopithecines from gracile australopithecines.
Greater prognathism, less flaring cheekbones, and smaller cheek teeth are characteristics of gracile australopithecines.The strong australopithecines have huge jaws, enormous molars, flaring cheekbones, strong projecting brow ridges, and post-orbital constriction.
What cranial trait do robust australopithecines share?They are distinguished from other, more gracile hominins by a number of skull characteristics that gave them a "robust" appearance.Large, densely enameled postcanine teeth that have been supported by deep, broad mandible corpora with tall, broad rami are the most prominent of these characteristics.
What are the three Australopithecus species that are classified as gracile?Traditionally, robusts include the later Australopithecus boisei and robustus, while graciles include the approximately two million year old Australopithecines africanus and africanus.
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PLEASE HELP!!!! which statement best distinguishes between the function of genes and alleles? responses genes provide variation in traits, while alleles express traits.
A genes provide variation in traits, while alleles express traits.
B. alleles are responsible for variation in traits, while genes are responsible for the expression of traits.
C. alleles provide duplicate copies in case of mutation, while genes express all mutations
D. alleles provide duplicate copies in case of mutation, while genes express all mutations
Genes are genetic units that code for traits. Alleles are alternative forms of the same gene that express different phenotypes of the same trait. B) alleles are responsible for variation in traits, while genes are responsible for the expression of traits.
What are genes and alleles?
Genes are the hereditable DNA fragments that transmit the information needed to specify traits.
This information passes from parents to offspring, generation to generation.
Genes are physically placed and arranged in chromosomes. Each chromosome contains too many genes that might vary in length.
Alleles are different forms of a gene that result from a mutation in the original gene.
By the process of natural mutation, a gene might change into two or more alternative forms that are called alleles.
These alternative forms codify for the same trait expressing different phenotypes.
The correct option is B. alleles are responsible for variation in traits, while genes are responsible for the expression of traits.
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1) Which correctly describes sister chromatids? (1 point)
Responses
They are the daughter cells that form during cell replication.
They form during metaphase when DNA is replicated.
.
They make up the mitotic spindle within the cell.
They are part of the lined-up chromosomes in mitosis.
2)Which of the following correctly orders events during mitosis?(1 point)
The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes. The nuclear membrane dissolves.
Microtubules organize the chromosomes. The nuclear membrane dissolves. The mitotic spindle attaches to chromosomes.
The nuclear membrane dissolves. The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes.
The nuclear membrane dissolves. Microtubules organize the chromosomes. The mitotic spindle attaches to chromosomes.
Answer: They are part of the lined-up chromosomes in mitosis.
Explanation:
within a strand of rna, nucleotides can contain one of four different nitrogenous bases. what is the impact of this variation in nitrogenous bases? (4 points)
the impact of this variation in nitrogenous bases.
Translation is done by ribosomes, not proteins.
The process of making proteins in a cell takes place at an intercellular structure called a ribosome, which is formed of both RNA and protein. The messenger RNA (mRNA) sequence is read by the ribosome, which then converts the genetic code into a specific string of amino acids that develop into extended chains and fold to create proteins.Ribosome. The biological machinery that produces proteins is known as a ribosome. Each cell contains several ribosomes, which are each composed of two subunits. These two subunits form a tight seal around the messenger RNA molecule before moving down its length and reading each three-letter codon. The transfer RNA, whose base sequence matches that of the messenger RNA, docks to the ribosome. A specific amino acid can be added to the end of the expanding protein chain by pairing each three-letter messenger RNA codon with the corresponding anticodon on a particular transfer RNA. Once the protein is finished, the ribosome fragments.
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An antibonding molecular orbital has a lower electron density in the internuclear region than that of the atomic orbitals.
Antibonding molecular orbitals are those that make molecules more energetic in comparison to the presence of individual atoms while weakening the link between atoms.
How is a molecular orbital for antibonding created? What distinguishes it from the combination of atomic orbitals?The molecular orbital is created when an equal number of atomic orbitals overlap one another. Antibonding molecular orbitals are the two atomic orbitals created as a result of the linear combination of atomic orbitals in the same phase or in a different phase.
What is the reality of antibonding atomic orbitals?The two atomic p orbitals from which it is created have a lower energy than the antibonding molecular orbitals. The two atomic p orbitals that it is created from have a lower energy than the bonding atomic orbitals.
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half of the offspring have white flowers, what is the genotype of the plant with purple flowers
Answer:
Half the offspring have a heterozygous genotype, Ff. Half have a homozygous recessive genotype, ff. Thus, half the offspring have purple flowers, and half have white flowers. The resulting genotypic ratio is 1:1 of heterozygous:homozygous recessive.
Branliest Please! (Crown)
which molecule has the greatest effect in controlling lung ventilation? a. oxygen in the blood b. hydrogen ions in the blood c. carbon dioxide in the blood d. oxygen in the cerebrospinal fluid
The correct answer is option C
C carbon dioxide in the blood
What is Lung ventilation?
In "Lung Ventilation: Natural and Mechanical," the processes of respiration and lung ventilation are discussed, with an emphasis on the problems specifically associated with mechanical ventilation. The anatomy and physiology of respiration, as well as how the lungs and the rest of the respiratory system are involved, are covered at the beginning of the chapter. The three mechanical ventilation working principles are then introduced. It then concentrates on intermittent positive pressure ventilation (IPPV), which is how the majority of contemporary critical care ventilators work, and explains how it works pneumatically. The chapter concludes with a comparison of mechanical/artificial and natural lung ventilation.
The majority of patients who need mechanical breathing have both lungs inflated and deflated simultaneously. Mechanically separating the lungs such that only one lung may be ventilated is known as one lung ventilation (OLV). OLV is a common technique for facilitating surgical exposure during thoracic procedures. It can be used to separate a pathologic lung from a healthy lung to minimize soiling or to allow for differential ventilation.
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Choose all the answers that apply.
Which of the following are found in plant cells, but never in animal cells?
cell membranes
chloroplasts
cell walls
vacuoles
A small seawater ecosystem suddenly receives too much rain. Which is the most likely result?
A. The salinity increases then returns to normal.
B. The salinity decreases.
C. The salinity remains the same.
D. The salinity destroys the inhabitants.
There will be more rain in some areas of the Earth if a region becomes saltier than usual.
What occurs as salinity rises?In some areas of the ocean, little rain falls, yet warm, dry breezes greatly increase evaporation.Water is removed through evaporation; however, because salt is left behind as the water vapour rises into the atmosphere, the salinity of the ocean rises as a result. The ocean thickens as a result of this.The freezing point of water drops as salinity rises (29), which means that an ocean with a higher salinity has less potential to form sea ice and stays ice-free at much lower temperatures.By dehydrating the plant, blocking the uptake of nitrogen, and poisoning it with chloride ions, saline water slows plant growth.Rainwashing mineral ions from the land into water is the main cause of ocean salinity, or salt in the sea.To learn more about occurs as salinity rises refer to:
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the four generalized phases in the development of an animal are: (i) organization of the body along , (ii) organization of the body into several smaller , (iii) organization of cells in ways that produce body parts and (iv) cell , where cells change morphologies and become specialized.
The four generalized phases in the development of an animal are: (i) organization of the body along axes, (ii) organization of the body into several smaller regions, (iii) organization of cells in ways that produce body parts and (iv) cell differentiation, where cells change morphologies and become specialized.
The 4 critical techniques through which a multicellular organism is made: mobileular/cells proliferation, mobileular specialization, mobileular interaction, and mobileular movement. In a growing embryo, most of these techniques are going on at once, in a kaleidoscopic range of various methods in unique elements of the organism.
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A ____ is a neutron star that rotates and generates radio waves
Answer:
Pulsar.
Explanation:
I took the test:)
How did the discoveries of thomson and rutherford change dalton's atomic theory?.
Answer:
The discovery of the electron disproved the part of Dalton's atomic theory that assumed atoms were indivisible. Atom comes from the word uncuttable meaning atoms are in fact indivisible.
Explanation:
before a molecule of mrna can be translated into a protein on the ribosome, the mrna must first be transcribed from a sequence of dna. what amino acid sequence does the following dna nucleotide sequence specify?
The amino acid sequence the following nucleotide will code for is Met-Ser-Cys-His.
The information present in the DNA is transcribed into mRNA which is then translated to amino acids that make proteins. The process of transcription and translation combined are referred to as central dogma.
In the scenario above, the given sequence of nucleotide is 3′−TACAGAACGGTA−5′ which code for the following mRNA sequence: AUGUCUUGCCAU. Now based on this code, the proteins that will be made are to be determined.
The correct question is
before a molecule of mRNA can be translated into a protein on the ribosome, the mRNA must first be transcribed from a sequence of dna. what amino acid sequence does the following DNA nucleotide sequence specify?
3′−TACAGAACGGTA−5′
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the replication of scientific studies is an important and necessary component of empirical research and science in general. what are some of the benefits of replication? select all that apply.
The benefits of replication are
they provide information on generalization of the research findings.they can help support the original research study.Empirical research is research that is based on empirical evidence. It is also a method of acquiring knowledge through direct and indirect observation or experience. Some types of research are more valued by empirical research than others. Quantitative or qualitative analysis of empirical evidence is possible. Empirical research is based on observed and measured phenomena, and knowledge is derived from actual experience rather than theory or belief.
An example of empirical analysis would be if a researcher wanted to know if listening to happy music encourages prosocial behavior. An experiment could be carried out in which one group of the audience is exposed to happy music while the other is not.
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how can you tell? name 1 distinguishing feature that allows you to identify it as that region of the gi tract.
It has four layers. The mucosa is the deepest layer, followed by the sub-mucosa and muscularis propria. The adventitia or serosa is the outermost layer. water and electrolytes absorption.
Other than excrement propulsion and defecation, the large intestine's gross activities include absorbing vitamins created by the region's bacteria and absorbing water and electrolytes. The muscularis propria (Detrusor muscle) is made up of dense bundles of smooth muscle as opposed to the muscularis propria to thin fascicles. Small biopsies may find it challenging to make this distinction. Variable areas of the bladder have different muscularis propria thickness and patterning. Most solid electrolytes can be categorized into the four classes of mucosa. Gel electrolytes are chemically similar to liquid electrolytes.
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how does the development of living organisms compare to the fossil record of closely related organisms?
Fossils are the preserved remains or traces of extinct animals, plants, and other organisms. Because they demonstrate that earlier life on Earth was distinct from the life found today, fossils are crucial proof of evolution.
By counting the number of differences between the DNA or amino acid sequences of two species, molecular clocks can estimate how closely two species are related. All living things share the same biochemical building blocks, which is molecular evidence for evolution.
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Which hypothesis is supported by the data?
The hypothesis that is supported by the data is that the milkweed population is a biotic factor whose population decreases as the amount of sunlight, an abiotic factor, decreases. Option A.
Biotic and abiotic factorsThe biotic factors of the environment are all the living organisms in the environment. The abiotic factors, on the other hand, are the nonliving components of the environment, such as sunlight, precipitation, pH, etc.
Thus, in the data shown, the milkweed is a biotic factor while the sunlight is an abiotic factor.
The data further shows that as the amount of shade increases, the population of milkweed also decreases. The amount of shade available in a place is a function of sunlight. The more sunlight, the lesser the amount of shade available, and vice versa.
In order words, the population of the milkweed plant decreased in response to the decrease in the amount of sunlight (which increases shade) available in the environment.
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animals and plants both have diploid and haploid cells. how does the animal life cycle differ from the alternation of generations exhibited by plants?
Only the gametes are haploid; otherwise, almost all creatures live diploid dominant lives. They are unable to split once the haploid gametes have been created. Multiple cell haploid life stages don't exist.
In contrast, plants have a mixture of the haploid and diploid dominance cycles since they have both haploid and diploid multicellular organisms as a component of their life cycle.
Due to its ability to produce haploid spores during meiosis, the diploid plant is known as a sporophyte. Because they produce gametes, the spores grow into haploid, multicellular plants known as gametophytes.
What is the difference between life cycle of animal and plant?
In multicellular creatures, there is just one generation in the life cycle. The haploid sex cells are created by meiosis in the diploid organism. Other cells in the body are all diploid and are created during mitosis. Male and female sex cells combine during fertilisation to form a new diploid creature. The organism is diploid and does not alternate between haploid and diploid generations.
Life cycles fluctuate between diploid and haploid generations in plant multicellular organisms. Through meiosis, the diploid sporophyte phase of the cycle generates haploid spores. A haploid gametophyte structure is created as haploid spores multiply through mitosis. The cycle's haploid stage is represented by the gametophyte.
The gametophyte creates both male and female gametes after reaching maturity. A diploid zygote results from the union of haploid gametes. A new diploid sporophyte is created by the zygote growing through mitosis. Accordingly, unlike in animal beings, plant species can switch between the diploid sporophyte and haploid gametophyte phases.
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Identify the factors that stimulate production of pancreatic juice.
Multiple select question.
Gastrin
Secretin
Parasympathetic impulses
Sympathetic nerves
Cholecystokinin
The release of the pancreatic juice was stimulated by secretin
What does a pancreas do?
The pancreas is a spongy organ that is roughly 15 centimetres long and formed like a tube. It connects to the duodenum and is situated at the rear of the belly, behind the stomach.
Because it creates a range of enzymes that digest all main food categories, the pancreas is a crucial digestive organ.
The duodenum secretes these enzymes along with a significant amount of bicarbonate. Pancreatic secretions become alkaline as a result of bicarbonate.
Pancreatic fluids and hormones are produced by the pancreas. Enzymes included in pancreatic secretions aid in small intestine food digestion.
Insulin, which regulates blood sugar levels, is one of the hormones produced by the pancreas. Enzymes and hormones are both essential for the correct.
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the function of which of the following systems is to carry blood to all regions of the body to provide oxygen and nutrients and remove carbon dioxide and waste products?
The Circulatory System.
What is circulatory system?
Circulatory system is a group of organs responsible for the pumping , circulation and conduction of blood to each and every cells of the body. Circulatory system is extremely essential for our bodies as blood is the medium through which oxygen availability is made to the cellular framework . Also the circulatory system is responsible for removal of waste products and other metabolites away from the cells.
Components of Circulatory system -
The circulatory system consist of a pump- the Heart which by its forceful contraction pumps the blood to different organs. From the heart blood is carried away by Arteries. Arteries inside the organs divide into arterioles and Capillaries. From the organs the blood is taken up by the Viens towards the heart. The blood is then pumped towards the lungs where oxygenation of the blood takes place. The oxygenated blood again comes back to the heart where it repeats the cycle.
Thus Circulatory System carry blood to all the regions of the body.
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Classify the organisms based on how they obtain food.
Answer:
autotrophs and hererotrops
Explanation:
Organisms are characterized into two broad categories based upon how they obtain their energy and nutrients
Biologists divide the biosphere into ______, which are the major types of ecosystems on earth.
The biosphere is divided into biomes, which are the main categories of ecosystems on Earth.
What kind of organism creates organic chemicals that support fungus, animals, and all the other levels of a food web by harvesting energy?Chemoautotrophs are capable of fixing carbon dioxide to produce their own organic compounds. These species have the capacity to generate their own food or energy.
What criteria are used to categorize biomes?An area is categorized as a biome based on the species that call it home. A specific location's soil type, temperature range, amount of light, and water requirements create niches for particular species. enabling the definition of the biome.
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You are a microbiologist studying the E. Coli Lac operon.
You have two strains of bacteria that you are working with: a wild type (non-mutant) strain - Stain A, and a mutant strain - Stain B.
Strain B has a mutation in its promoter sequence. You place each strain in a Petri dish, with the indicated amounts of glucose and lactose (see Figure).
After 60 minutes, you measure gene expression at lacZ, a gene within the Lac operon.
You obtain the following for Strain A. Which of the locations in red would correspond to your level of expression for the mutant strain?
To help you here are the expression levels for a wild type cell.
You are a microbiologist studying the E. Coli Lac operon. Your level of expression for the mutant strain would correspond to no expression in red.
The lac operon of E. coli holds genes complicated in sweet substance absorption. It's signified only when hydrogen is present and hydrogen is missing. Two managers turn lac operon "on" and "off" in answer to oxygen and sweet liquid levels: the lac repressor and catabolite electrical device protein (CAP).
Expression of the oxygen lac operon is necessary for E. coli to metabolize sweet substances (milk carbohydrate) for element and strength. A mutation is an animal that experiences a metamorphosis. The word variant is secondhand in microbiology to concern a form of a bug that mutated from another mutant strain.
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The ability of the arteries to withstand a sudden large increase in pressure is accomplished by the: _________.
The flexibility of the smooth muscles allows the arteries to sustain a rapid, significant rise in pressure.
What makes an artery resilient to pressure?They have an outer layer of collagen and a thick wall to prevent the artery from rupturing under the intense pressure. In order to maintain pulse flow, the artery wall also has an inner layer of muscle and elastic fibers.
What property makes arteries resistant to high pressure?The aorta and pulmonary arteries, which are the closest to the heart, are elastic arteries because they have much more elastic tissue in the tunica media than muscular arteries do. The elastic arteries' ability to maintain a relatively constant pressure gradient despite the heart's continuous pumping is due to this property.
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In multicellular eukaryotes, different types of cells have _______ genes, and _______ gene expression.
Diverse cell types in multicellular eukaryotes have different genes, but they all express the same genes.
Do eukaryotes with many cells have the same genes?Even though all the cells in a multicellular organism have the same DNA, they may express quite diverse gene sets. A cell's distinctive characteristics are determined by the collection of proteins and functional RNAs that are expressed from the set of genes in that cell.
How many eukaryotic levels of gene expression are there?While eukaryotic cells regulate gene expression at the transcriptional, post-transcriptional, translational, and post-translational levels, prokaryotes only regulate gene expression at the transcriptional level.
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the hawthorne and apple maggot flies appear to have become reproductively isolated from each other largely because they: a. mate at different times of the day. b. occupy different parts of the habitat. c. have different mating behaviors. d. do not share the same reproductive organs. e. have adapted to two different hosts.
The Hawthorne and apple maggot flies appear to have become reproductively isolated from each other largely because e.)they have adapted to different hosts.
Initially, these two species are the same species and their host is the hawthorn tree. Speciation occurs when European settlers introduced apple trees in North America. Some flies of species born in the Hawthorne tree accept it as a host and continue to feed on this plant and mate with others flies on the Hawthorn tree. Flies that are born on apple trees accept it as a host and continue to feed on this tree and mate with other flies in this tree. Slowly after some time, these flies differentiated into two species.
This type of speciation which occurs without physical separation Or geographical separation is called sympatric speciation.
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a solid ball of about eight cells formed about 50 to 60 hours after fertilization is called a(n) .
A solid ball of about eight cells formed about 50 to 60 hours after fertilization is called a morula.
Define fertilization.
One sperm and one egg must recognize each other and fuse during the highly complex sexual reproductive process known as fertilization. Haploid gametes can build a genetically different person through fertilization and return to the usual number of chromosomes.
The first stage of development follows the union of an egg cell and a sperm cell, and is known as the zygote or fertilized egg (the fertilization ). The morula is a cell clump made up of 16–32 tiny diploid cells that develops from the zygote by cleavage (cell division). The embryo's volume doesn't grow throughout this initial period of development. The first cell differentiation happens in the generated morula.
The clump of cells develops into the embryoblast, which can be further subdivided into epiblast and hypoblast, the actual final embryo. The cells on the surface develop into the trophoblast, which gives rise to the placenta and amniotic membranes.
Because the embryo has formed a cavity known as the blastocoel, the blastula stage can be distinguished from the morula stage. The ab-embryonic pole is the side opposite the embryonic pole, which is the side where the cells that will make up the embryoblast are found. The trophoblast divides into syncytiotrophoblast and cytotrophoblast. The embryo inserts itself into the endometrium once it has reached the uterus.
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3. (4 pts) given two possible shapes of a trailing edge, (a) state/draw the conditions for the top and bottom surface velocities at point a that satisfy the kutta condition (for each case), (b) state the kutta condition in terms of the vortex sheet strength at point a.
A steady flow fluid dynamics notion known as the Kutta condition, specifically in the field of aerodynamics, is relevant to solid bodies with sharp corners, such as the trailing edges of airfoils.
In aerodynamics, solid things with sharp edges, such as the trailing edges of airfoils, are subject to the Kutta condition. When a fluid runs all the way around a solid body with sharp edges, none of the fluid passes through the sharp corner as it approaches the following edge from above and below. Therefore, it may be inferred that the velocity above and below are equivalent at the trailing edge.
The circulation around a body with a sharp trailing edge that is traveling through a fluid will be strong enough to retain the rear stagnation point at the trailing edge. The Kutta condition describes the flow pattern in which fluid approaches the corner from above and below, meets at the corner, and then flows away from the body. This applies to fluid flow around a body having a sharp corner. Nothing moves around the steep turn in the fluid. When applying the Kutta-Joukowski theorem to determine the lift produced by an airfoil with a sharp trailing edge, the Kutta condition is important. The value of the airfoil's flow circulation must be that value that would result in the Kutta condition.
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which of the three cranial nerves, involved in gustation, transmits special sensory impulses from the posterior tongue as well as general sensory impulses from the middle ear?
the glossopharyngeal nerve is the cranial nerves, involved in gustation, transmits special sensory impulses from the posterior tongue as well as general sensory impulses from the middle ear
the glossopharyngeal nerve (cranial nerve IX), which supplies fibres to the tongue's posterior third; and the vagus nerve (cranial nerve X), which supplies fibres to the epiglottis region. Taste fibres are classified as special visceral afferents (SVA). The glossopharyngeal nerve is one of the nine cranial nerves (CN IX). It sends motor, parasympathetic, and sensory signals to your mouth and throat. Among its many functions, the nerve helps raise a portion of your throat, allowing you to swallow. Glossopharyngeal nerve lesions cause difficulty swallowing, loss of taste over the posterior one-third of the tongue and palate, and loss of sensation over the posterior one-third of the tongue and palate.
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