what is cell wall ?

please help.​

Answers

Answer 1

Answer:

A cell wall is a structural layer found just outside the cell membrane that surrounds various types of cells. It may be robust, flexible, and even stiff at times. It functions as a filtration mechanism as well as providing structural support and protection to the cell.


Related Questions

Describe telephase (IN YOUR OWN WORDS)
-Thank you!

Answers

Answer:

Telophase is the last step of cell division, when chromosomes move in opposite directions so two new cells can be formed from one. When a cell is finishing the process of meiosis, it goes through a phase in which it's basically getting ready to split into two new cells telophase.

Explanation:

How can a scientist determine if two species are obligate mutualists? The scientist should observe the species in the environment to determine the types of interactions that the two species have. Then, the scientist should transplant each species alone to a new area and simultaneously transplant both species together to see if the single-species transplants die. The scientist should observe the species in the environment, determine the types of interactions that the two species have, and then add an invading species to see if it outperforms one of the other species. The scientist should observe the species in the environment, determine the types of interactions that the two species have, and then transplant both species to a new location to observe if they do better or worse than the individuals in their old location. The scientist should observe the species in the environment, determine the types of interactions that the two species have, and then remove one of the species to see if the other species does not survive.

Answers

Answer:

The scientist should observe the species in the environment to determine the types of interactions that the two species have. Then, the scientist should transplant each species alone to a new area and simultaneously transplant both species together to see if the single-species transplants die

Explanation:

When two species are obligate mutualists, both species benefit one another in such a way that one cannot survive without the other. Hence, in order to find out if two species are indeed obligate mutualists, they should be transplanted together away from other species on one side, and also transplanted individually on another side.

If they are obligate mutualists, the individual transplant would find it difficult to survive and should die in no time while the transplant done together should survive. All other factors being kept constant.

Just after they taste a sweet liquid, mice are injected with a drug that produces an immune response. Later, the taste of the sweet liquid by itself triggers an immune response. This best illustrates

Answers

Answer:

This question lacks options, options are:

a) classical conditioning

b) observational learning

c) spontaneous recovery

d) operant conditioning.  

The correct answer is a.

Explanation:

The classical conditioning theory derives from the experiments of the Russian physiologist Ivan Pavlov, he hypothesized that when any stimulus predicts the occurrence of another stimulus that triggers an automatic response, that first stimulus would acquire the ability to trigger that response, in other words , is a type of learning according to which an originally neutral stimulus, which does not provoke a response, becomes able to provoke it thanks to the associative connection of this stimulus with the stimulus that normally provokes said response. The conditioning of the immune response is built on the same principles of the classical conditioning paradigm described by Ivan P. Pavlov in which an environmental stimulus that by itself does not produce any immune reaction (conditioned stimulus), is associated with substances that stimulate or they suppress immune function (unconditioned stimulus), and finally, by presenting the conditioned stimulus alone, trigger the appropriate immune response.

Betty's metabolism is unusually sluggish. There is MOST likely an abnormality with Betty's _____ gland.

Answers

Answer: Betty's metabolism is unusually sluggish. There is MOST likely an abnormality with Betty's thyroid gland.

During glycolysis, glucose is broken down into two molecules of pyruvate.
A diagram shows the conversion of a glucose molecule to 2 pyruvic acid molecules. In this process, 2 A T P form 2 A D P, 2 N A D produce 2 N A D H, and 4 A D P produce 4 A T P.
What is the main transformation that occurs during glycolysis?
Glycolysis produces ATP and pyruvate by oxidizing water.
Glycolysis produces ATP and pyruvate by oxidizing glucose and NAD+.
Glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose.
Glycolysis produces CO2, ATP, and pyruvate by reducing glucose.

Answers

Answer:

Glycolysis produces pyruvate, ATP, and NADPH by oxidizing glucose. During cellular respiration, glucose combines with oxygen to form carbon dioxide, water, and ATP.

Explanation:

Answer:

C.

Explanation:

Who are the units of Newtons named
after?
A. American scientist, Sir Isaac Newton
B. English scientist, Sir Isaac Newton
C. French scientist, Sir Isaac Newton
D. German scientist, Sir Isaac Newton

Answers

C french scientists, Sir lsaac newton
B English scientist Issac Newton was born in England

An amoeba is a single-celled organism that feeds on algae, plant cells, and bacteria. When an amoeba feeds, it first makes contact with the food particle. Next, the amoeba starts to surround the particle. Once the particle is completely engulfed, it is surrounded by a layer of the amoeba's membrane, forming a vesicle. The pH in the vesicle is then lowered and the contents are degraded.

What type of transport is involved in this process?

A.
endocytosis
B.
diffusion
C.
passive transport
D.
exocytosis

Answers

Answer:

A.  endocytosis

Explanation:

Endocytosis is the type of transport that is involved in this process because it engulf the food material. Amoeba engulfs food particles with the help of its pseudopodia which are the projections of cell membranes. A food vacuole is formed around the food particle. This process of engulfing a matter by the projections of the cell membrane to form a vacuole is called endocytosis.

PLEASE PLEASE HELP ME WITH THIS PLEASE PLEASE HELP NOW PLEASE GOD PLUS YOU PLEASE please Help me please

Answers

Answer:

Sorry ...

Explanation:

Unfortuntely, you can only answer this question if you've read the book. Those reading this pretty much haven't.

Name the process by which sugar moves into cell A.
Name the process by which sugar moves into cell B.

Answers

Answer:

sugar moves into cell A by diffusion

sugar moves into cell B by Active transport

Name the process by which sugar moves into cell A - Diffusion

Name the process by which sugar moves into cell B - Active transport.

Glucose tends to move from an area of high concentration to an area of low concentration, a process called diffusion

the glucose transporter works with the concentration gradient, its process of moving glucose across the cell membrane is called facilitated diffusion.In order to move against the concentration gradient is due to cell require the transport method called active transportActive transport requires energy to move molecules against the gradient.

Thus, Name the process by which sugar moves into cell A - Diffusion

Name the process by which sugar moves into cell B - Active transport.

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The ______ regulates the amount of glucose circulating in the blood by either synthesizing glycogen or breaking down glycogen.

Answers

Answer:

Glucagon

Explanation:

It is a peptide hormone secreted by the pancreas, raises blood glucose levels

Glucagon stimulates glycolysis, the breakdown of glycogen and the export of glucose into the circulation

Concerning the above image, what region of the eye contains rods/cones?

A) Sclera
B) Optic Nerve
C) Choroid
D) Retina
E) Other:

Answers

Answer:

Retina

Explanation:

The retina has rods and cones.

Rods help us see dim images and comes help us see bright and colored images.

1) which of the following terms is defined as ''all the organisms living in a particular place and their interactions with each other and with their environment ''

A) habitat
B) population
C) community
D) ecosystem ​

Answers

Answer:

D) Ecosystem I think

Answer:

B. population

Explanation:

they are interact with each other

Archie took several deep breaths of air. By breathing deeply, what mechanism did he assist to return venous blood to his heart

Answers

Answer: Respiratory pump

Explanation:

By breathing deeply, the mechanism that Archie did hessist to return venous blood to his heart.

During the process of inspiration and expiration when the muscles contract and relax, pressure changes takes place in both the thoracic and abdominal cavities and this changes compress the nearby veins and help im the return of blood to the heart.

in your own words, what is the definition for Anti-codon?

Answers

Answer:

Basically an Anti-Condon is a sequence of three nucleotides forming a unit of genetic code in a transfer RNA molecule, corresponding to a complementary codon in messenger RNA.

Explanation:

Codons are trinucleotide units that present in mRNA and codes for a particular amino acid in protein synthesis. Anticodon is trinucleotide units that present in tRNA. It is complementary to the codons in mRNA.

Hoped this helped :)

An endoscope is a fiber-optic medical instrument that emits light. Doctors can insert endoscopes into hollow body parts. Which property of fiber-optic strands makes them most useful in endoscopes?

They can create virtual images.
They are decorative and colorful.
They can transmit data quickly.
They are small and flexible.

Answers

Answer:

Sorry i`m late but the answer is they create virtual images

Explanation:

The property of fiber-optic strands that makes them most useful in endoscopes is that they are small and flexible.

What is an endoscope?

An endoscope is a medical instrument that consists of a long, thin, flexible tube equipped with a light source and a camera at the tip. It is used by doctors to visualize and examine internal organs or structures within the body. The endoscope can be inserted through natural body openings like the mouth, anus, or small incisions to access various areas of the body.

It allows for direct visualization of the internal organs, capturing real-time images or videos that can be viewed on a monitor. Endoscopes are commonly used for diagnostic purposes, such as examining the gastrointestinal tract, respiratory system, urinary tract, or joints. They can also be used for therapeutic procedures, such as removing polyps, taking biopsies, or performing minimally invasive surgeries.

Endoscopes have revolutionized medical diagnostics and interventions by providing a less invasive alternative to traditional surgical methods.

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If a person uses up his or her reserve supply of glycogen and still does not eat, the body will break down ____ to provide glucose for the brain.

Answers

Answer:

carbohydrates

Explanation:

this is because even though the person hasn't eaten he or she still has an amount of carbohydrates in the body that can be broken down and its end product glucose will be obtained

2. Why are humans considered animals?

A. Their zygotes undergo changes to turn into a blastula.

B. Human cells have cell walls and are unable to move.

C. Humans can reproduce asexually when under stress,

D. Animals and humans are both uni-cellular organisms.

Answers

Answer:

It's A

Explanation:

Had it on a test

Humans are considered animals because as in animals zygotes after cell division turns into a blastula, hence option a is correct.

What are animals?

More than any other species, humans are capable of learning new things. Indeed, the majority, but not fully, of what distinguishes us from other animals is anchored in language.

In addition, because we have a backbone, humans are considered to be members of the chordate animal phylum.

The zygote is split into the blastula after fertilization, three germ layers develop in the blastula, which in some species is a hollow ball of cells, during a process known as gastrulation.

Therefore, humans are classified as members of the primate order within the animal group and having the blastula stage, hence option a is correct.

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What is not one of the 3 major areas of society affected by science

Answers

Answer:

biology

Explanation:

Answer:

D.

Explanation:

Justice

Hope it helps

¿Cómo transformamos las fuentes de energía renovable en energía eléctrica necesarias para el desarrollo sostenible de nuestro país?

Answers

Answer:

Answer to the following question is as follows.

Explanation:

Natural energy is used to generate power in renewable technologies. Wind, wave, ocean, hydro, biomass, and solar energy are all potential sources of energy. ... A variety of technologies, such as floating offshore wind farms, biomass power plants, and hydroelectric systems, will be required to achieve this.

Renewable energy production and utilisation will enhance energy security, the environment, the economics, mechanical production, construction, transport, and industry, as well as assist in the creation of new employment. Solar, wind, and biomass energy can fulfil local energy demands while also helping to enhance environmental protection.

Which of the following is NOT
true of the female gamete
development?
A. The central cell divides into four
haploid cells.
B. There are multiple ovules in an ovary.
C. The flower is what draws in pollinators.
D. There is more than one egg cell in each
ovule.

Answers

C is the answer for that

Answer:

It’s D

Explanation:

A teacher gave the lab group shown below an "unsafe practice" warning. What is most likely the basis for the teacher's warning?

Answers

The teacher warning could be the practice you are about to do can harm you in some way if that careful. Please let me know if I'm understanding this.

List in order the levels of classification,beginning with domain

Answers

Answer:

The answer is Domain, kingdom, phylum, class, order, family, genus, species.

What is the plural of drive-in? Use a dictionary if necessary.
O drives-in
O drive-ins
O both

Answers

answer is drive- ins
“s” at the end as in multiple

Cell replication is important for reproduction of body cells and reproduction of gametes. Which type of reproduction occurs only in gametes

Answers

Answer:

meiosis

Explanation:

meiosis occurs in reproductive organs

can someone help me complete the unfinished DNA strands please?

Answers

Answer:

it is T G C A T

Explanation:

as in DNA adenine pairs with thymine and cytosine with guanine. You can also remember it as Apple Tree and Car Garage

A founding population usually has lower genetic diversity than the original population it came from. For those alleles that are shared by the two populations, how are allele frequencies different (or similar)

Answers

Answer:

In the founding population, the allele frequency is different from the original bigger-sized population. The size of the new population affects this difference even more. Some of the alleles will tend to increase, while some others will tend to decrease in frequency.

Explanation:

Genetic drift is an evolutive force. It is the random change that occurs in the allelic frequency of a population through generations. Its effects are harder in a small-sized population, meaning that the magnitude of this change is inversely related to the size of the original population.  

Genetic drift results in some alleles loss -including the beneficial ones-, while some other alleles get fixated. Low-frequency alleles are the most likely to be lost. The changes produced by genetic drift accumulate in time and results in a loss of genetic variability within a population.  

Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure -bottleneck effect- or because of a population split -founder effect-. The bottleneck effect most likely affects smaller populations.  

Founder effect refers to the origin of a new population from only a few individuals that are coming from a bigger-sized population. These founder individuals, which are carrying some of the genes of the original population, settle down in a new area and reproduce. The new and small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be lost by complete. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition. When the number of individuals that originated the new population is low, the founder effect will be very extreme because the genetic drift effects are inversely proportional to the original number of individuals.  

Which organism exhibits behavioral adaptation?
an owl with large pupils and eyes that enable it to see better at night
a possum playing dead to increase its chances of survival
an insect that mimics its environment to hide from its predators
a desert plant that sheds its leaves to lessen water loss during the dry season

Answers

Answer:

B

Explanation:

edge2021

A possum playing dead to increase its chances of survival is an example of behavioral adaptation.

What is Behavioral adaptation?

This is an action an organisms does to increase survival rate when faced with some situations.

A good example is the possum which acts dead when faced with predators so as not to be killed which is why option B was chosen.

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How do spores survive even after the plant has died?
Spores are protected in a protective covering preventing it from drying out.
O Spores have special chemicals that prevent it from dying.
Spores are buried under rocks.
O Spores can naturally live forever.

Answers

Answer:

spores have special chemicals that prevent ot from

How is an organic compound different from an inorganic compound?


Organic compounds contain carbon atoms bonded to other atoms.


Inorganic compounds contain oxygen atoms and hydrogen atoms.


Organic compounds come only from nonliving things.


Photosynthesis is responsible for organic compounds.

Answers

Answer:

The correct answer is

" organic compounds come only from nonliving things".

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Organic compounds contain carbon atoms bonded to other atoms. The correct option is A.

What are organic compounds?

Any of a wide area of chemical compounds in which one or many carbon atoms are covalently connected to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.

Carbides, carbonates, and cyanides are among the few carbon-containing compounds that are not classified as organic.

The main distinction between organic and inorganic compounds is that organic compounds always contain carbon, whereas most inorganic compounds do not.

Furthermore, almost all organic compounds contain carbon-hydrogen or C-H bonds.

Organic foods are grown without the use of synthetic pesticides, fertilizers, or herbicides.

Organic meat, eggs, and dairy products are derived from animals that have been fed natural feed and have not been given hormones or antibiotics.

Thus, the correct option is A.

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Manpower is the most important resource of an organization. Explain.​

Answers

Answer:

Manpower planning is counted as the most important function of the human resource management of the organization. It helps in managing the maintenance of the business goodwill by providing value to the man, material, machine and money.

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