1) Can anyone say any sources of Natural fibres
2) What are some uses of Natural fibres

Answer:

There is no cartilage but there is epithelium

Explanation:

The pharynx of the human respiratory system does not contain cartilage.

The pharynx,  part of the human respiratory system, is a muscular tube that connects the nasal cavity and mouth to the larynx and esophagus. It serves as a passage for  air and food. The gorge is made up of several regions, each with its own distinctive features.

The nasopharynx, the top part of the throat, contains no cartilage. Instead, it is lined with pseudostratified ciliated  epithelium.This special epithelium helps to trap and transport mucus along with any particles or pathogens in the digestive system for elimination.

These regions also lack cartilage but  are lined with  stratified squamous epithelium. This type of epithelium provides protection from mechanical stress and potential abrasion caused by the passage of food and other substances down the pharynx.

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Genes that are located on the same chromosomes are linked genes. Alleles for these genes tend to segregate together during meiosis unless they are separated by crossing-over. The closer together two genes are on a chromosome, the less likely their alleles will be separated by crossing-over. A pair of genes with a larger recombination frequency are likely farther apart, while a pair with a smaller recombination frequency are likely closer together.

The figure shows two alleles that are closest together - tail-feather length aand feather color which is only 4 units in distance.

Answer:

True

Explanation:

Answer:

2 is the right answer

Explanation:

they do not produce fruit or flowers  think of a pine treee of a spruce tree

Gymnosperms are a group of seed plants that produce no flowers or fruit. Therefore, option B is correct.

A relatively tiny class of plants known as gymnosperms produce seeds and lack flowers. This means that unlike in a fruit, where the seeds are formed inside the reproductive structure, they are produced on the surface of the reproductive structure.

The Coniferophyta, Cycadophyta, Gingkophyta, and Gnetophyta are the four primary phyla that makeup gymnosperms. Conifers, which have needle-like leaves and thrive in arid, cold climates, are the most common gymnosperm.

Some examples of gymnosperms are ginkgo, pine, melinjo. sago palm, cedars, and spruces. Gymnosperms are a group of seed plants that produce no flowers or fruit. Therefore, option B is correct.

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When sodium azide (NaN3) decomposes, it produces nitrogen gas (N2) and sodium metal (Na) as the other product:

2 NaN3(s) → 2 Na(s) + 3 N2(g)

The balanced chemical equation for this reaction indicates that the other product formed is sodium metal (Na). This is because the mass and charge are balanced on both sides of the equation.

Furthermore, sodium is an alkali metal and is highly reactive, making it a plausible product of a chemical reaction. Additionally, sodium is known to react with water to produce hydrogen gas and an alkaline solution, which can explain why the residue left after airbag deployment is often a white powder or a yellowish substance, which is the alkali metal hydroxide formed from the reaction of the sodium with moisture in the air.

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Answer:I’m sure the answer is D

Explanation:

All eukaryotes evolved from prokaryotes and eventually developed into mitochondrial organelles.

The endosymbiotic theory represents that some of the organelles in eukaryotic cells were prokaryotic microbes at some time. As per the endosymbiosis theory the eukaryotic cells were at first large prokaryotic cells that absorbed smaller prokaryotic cells.

Endosymbiosis is the engulfing of the cell by another one to produce, over time, a coevolved relationship in which none of the cell could survive alone.

It is an evolutionary theory that guides the origin of eukaryotic cells by prokaryotes.

Eukaryotic cells were previously large prokaryotic cells that actually absorbed smaller prokaryotic cells

Thus, the correct option is D.

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Answer and Explanation:

1. The biggest similarity between the main types of vertebrae is the location where they are found since they are all established on the body's back, precisely on the midline of the back. The main differences, on the other hand, are related to the size and weight of each of them.

2. The similarities exist because all the vertebrae have to promote the support of the body, the back being the most appropriate place for them to establish themselves.

3. The differences are related to the function and type of support that each vertebrae promotes, the higher the level of systemization, the larger and thicker the vertebrae must be.

4. The caudal vertebrae should be similar to the vertebrae of the coccix, since a tail would be a representation of elongation of the coccix. We can reach this conclusion through the analysis of images that promote the visualization of this area of the body.

According to the information, we can infer that the Independent variable: Temperature (specifically, the range of temperature). On the other hand, Dependent variable: Distribution of pikas. Additionally, Control: Pikas within their tolerance range of temperature and Constants: Other environmental factors, habitat conditions, and population of pikas.

In this experiment, the independent variable is the temperature, specifically the range of temperature. The researcher will manipulate and observe how different temperature ranges affect the distribution of pikas.

The dependent variable is the distribution of pikas. It refers to the geographical or spatial range in which pikas are found. The researcher will measure and analyze how the distribution of pikas changes in response to different temperature ranges.

To ensure test validity, a control group of pikas within their tolerance range of temperature needs to be included. This group will experience temperatures within the range they can tolerate, providing a baseline for comparison. By comparing the distribution of pikas in different temperature ranges to the control group, the researcher can determine the impact of temperature on their distribution.

To maintain validity, other environmental factors such as altitude, precipitation, vegetation, and habitat conditions should be kept constant across the experimental groups. Additionally, the population of pikas being studied should be consistent, without any significant changes in population size or genetic composition throughout the experiment. These constants help isolate the effect of temperature on pika distribution and minimize confounding variables.

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Diatoms contain chloroplasts that have four membranes. These four membranes are evidence of secondary endosymbiosis (Option c).

Secondary endosymbiosis is a hypothesis used to explain why diatom chloroplasts have four membranes.

According to this hypothesis, diatoms received different genes from distinct photosynthetic and non-photosynthetic ancestors.

The acquisition of genes of different ancestors led to diatoms having chloroplasts with four membranes.

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The butterfly sucks the juice out of the flower to eat the butterfly can fly up to 12 to 14 hours. I think that is right

Answer:

in the explanation ALSO PLEASE ANSWER MY LATEST QUESTION PLEASE ITS A TIMED TEST.

Explanation:

animal cells have a nucleus and other membrane-bound organelles Unlike the cells of plants and fungi, animal cells lack a cell wall. This gives animal cells flexibility.

Rusting of iron and cutting an onion are both examples of chemical changes.

Rusting of iron is a chemical change because it involves a reaction between iron, oxygen from the air, and water. The iron reacts with oxygen to form iron oxide, commonly known as rust. This process is irreversible, and the chemical composition of the iron is altered during rusting.

Cutting an onion is also a chemical change because it involves the disruption of the onion's cell structure and the release of enzymes. When you cut an onion, enzymes stored within the cells are released, reacting with certain compounds to produce sulfur compounds. These compounds are responsible for the pungent smell and the tears that occur when cutting an onion. The cutting process causes a chemical transformation in the onion's composition, making it a chemical change.

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The BAC of a person who has a slight impairment of judgment and coordination is 0.05 percent.

At a BAC of 0.05%, the person may experience a slight impairment of judgment, coordination, and inhibitions, leading to reduced alertness and decreased concentration. However, in most countries, including the United States, this BAC level is still legally allowed to drive. It's important to note that alcohol affects people differently based on various factors such as weight, gender, and metabolism, so it's always best to avoid drinking and driving altogether.

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--The complete question is, What is the BAC (blood alcohol concentration) of a person who has consumed alcohol to the extent that they have a slight impairment of judgment and coordination, but are still legally allowed to drive in most countries, including the United States?--

Answer: it is D

Explanation: if you get a gene from your parents it's a gene you get it's not a mutation because if it was it would've been like a calico color but since it's just black it's D.

Physicians used repetitive transcranial magnetic stimulation (rTMS) to treat Jack's depression. This is a non-invasive procedure that uses magnetic fields to stimulate specific areas of the brain. During rTMS treatment, a coil is placed on the scalp over the targeted area of the brain, and a magnetic pulse is delivered to the area. This pulse stimulates nerve cells in the brain, and can help to improve symptoms of depression.

The exact mechanism of action of rTMS is not fully understood, but it is thought to work by increasing the activity of certain areas of the brain that are involved in regulating mood. This increased activity can lead to improvements in symptoms of depression, such as low mood, feelings of hopelessness, and lack of interest in activities.

Overall, rTMS is a safe and effective treatment option for depression that does not involve medication. It can be used in combination with other treatments, such as talk therapy or medication, to provide a comprehensive approach to treating depression.

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2) No, a genetic counselor could not determine if an individual has cystic fibrosis following an examination of that person's karyotype.

3) The normal karyotypes of both parents do offer some assurance that they will not have a child with Turner's syndrome.

2) No, a karyotype analysis could not be used by a genetic counsellor to establish whether a patient has cystic fibrosis. The CFTR (cystic fibrosis transmembrane conductance regulator) gene, which is not evident on a karyotype, is the specific gene that leads to cystic fibrosis. Further tests, such DNA sequencing or a sweat test, would be required to identify cystic fibrosis.

3) The fact that both parents' karyotypes are normal does provide some reassurance that they won't give birth to a child who has Turner's syndrome. A karyotype examination would be able to identify a missing or partial X chromosome, which is what causes Turner's syndrome. Turner's syndrome is extremely uncommon to be inherited from parents whose karyotypes are normal. There is, however, no 100% assurance that their child will not have Turner's syndrome, as spontaneous genetic mutations can happen during fetal development.

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Answer:

RBC-biconcave

Skin-polygonal(might be best answer as shape changes according to the layer)

nerve cells-dendritic or tree shape(star shape with tail)

rbc cells have biconcave shape to allow increased surface area for exchange of gases and passage through narrow capillaries.

skin cells have mainly barrier function and polygonal shape allows them to extensively arrange themselves to make an efficient barrier.

nerve cells-they have to gather impulses from various other cells in many directions so star shape cell body allows this and tail(axon) is for transmitting it which in turn relays this information to other nerve cells this completing the pathway for sensory impulses and motor responses.

Explanation:

The value of the missing side in the triangle that we have in the question is 12.

Numerous disciplines, including mathematics, physics, engineering, and architecture, frequently use the Pythagorean theorem. It offers a way to determine side lengths that are unknown or determine whether a triangle is a right triangle. It also forms the basis for trigonometry, the study of the connections between triangles' angles and sides.

Using;

\(c^2 = a^2 + b^2\\x^2 = 14^2 - 7^2\)

x = 12

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Explanation:

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Hydrologists are most likely to perform actions relating to estimating the amount of groundwater in an aquifer.

Hydrologists are scientists that specialize in the study of how water relates to the various crusts of the earth.

Hydrology in itself refers to the branch of science that studies how water moves relative to the earth's crusts.

Thus, species identification, age of fossils, or extracting underground oils have nothing to do with the work of hydrologists.

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Explanation:

i dont.know im in that qt

Answer: Epithelial Tissue Learn with flashcards, games, and more — for free. ... The apical surface may have either microvilli or cilia. ... Epithelial tissues protect both external and internal surfaces from dehydration, abrasion, and destruction by ... pseudostratified (sū′dō-strat′i-fīd; pseudo = false, stratum = layer) epithelium.

Explanation: I hope this helps UwU

The presence of cilia on an epithelial tissue's apical surface DOES NOT INDICATE that the tissue is sensitive to pressure (this statement is FALSE)

In conclusion, the statement above is FALSE because the presence of cilia on an epithelial tissue's apical surface DOES NOT indicate that the tissue is sensitive to pressure.

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Answer:

a. analogous

b. homologous

c. analogous

d. homologous  

e. homologous

f. homologous  

Explanation:

a. Analogous. Porpoises are mammals while salmon are fish. In this case, fins are analogous structures that evolved separately in both groups.

b. Homologous. Pectoral fins evolved from the forearms of tetrapods, and early tetrapods evolved from fish.

c. Analogous. These structures evolved independently through convergent evolution in both groups.

d. Homologous. They are homologous structures that were inherited from a common ancestor (primates).

e. Homologous. Bright red bracts (modified leaves) of poinsettia and green leaves of rose share a common ancestor (i.e., angiosperms).

f. Homologous. They are homologous structures that were inherited from a common ancestor (i.e., angiosperms).

Answer:

c

Explanation:

Answer:

Ann atom of hydrogen consists of one proton surrounded by one electron

Answer:

its C I believe

Explanation:

Answer:

against the concentration gradient

Explanation:

Neurons or brain cells are the structural and functional units of the nervous system. The parts of a neuron consist of a cell body, dendrites, and axon. Neurons functions as transmitters of nerve impulses to other cells. There are three types of neurons namely sensory neurons, motor neurons, and interneurons. Sensory neurons are responsible for carrying nerve impulses from tissues and organs to the spinal cord and brain. While the motor neurons are the ones that carry nerve impulses from the brain and spinal cord to muscles and glands. The last one, the interneurons functions as the carrier of nerve impulses back and forth between sensory and motor neurons.

Answer:

GGC AUU, in transcription pair for RNA, Uracil is present instead of Thymine.

Answer:

Explanation:

Glucose/Na symporters cannot diffuse across from the apical side to the lateral or basal sides because of the lipid bilayer (the hydrophobic tail/part will prevent it from crossing). However, a facilitated diffusion approach is "endorsed" here,  a specialized carrier protein called glucose or sodium transporter is used to transfer/diffuse the glucose or sodium to the basal side of the cell.

NOTE: These lipid bilayers are present in the cell membrane and are actually responsible for the selective nature of what goes in or out of the cell. The bilayer consists of the hydrophilic head and the hydrophobic tail.