What is the main function of the cell membrane in a plant cell?

Answers

Answer 1

Answer:

Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in.

Answer 2

Answer:

The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.Explanation:

because it is


Related Questions

a 2 Which characteristic is unique to invertebrates?
A.
B.
C.
D.

Answers

Answer:

A

they are immobile, correct

They are immobile are the  characteristic is unique to invertebrates.

What are Invertebrates?

Animals without a backbone or skeletal skeleton are known as invertebrates.

They come in a variety of sizes, from tiny mites and nearly invisible flies to enormous squid with eyes the size of soccer balls. There are millions more species to be discovered after 1.25 million have already been identified, the most of which are insects.

Invertebrates are successful in part because of how quickly they reproduce. For instance, corals and sponges both produce eggs and sperm. Social insects like ants and bees produce eggs that can become workers without needing to be fertilized.

Therefore, They are immobile are the  characteristic is unique to invertebrates.

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compare and contrast aerobic respiration, anaerobic respiration, and fermentation.

Answers

Answer:

Aerobic respiration is the type of cellular respiration that takes place in the presence of oxygen.

Anaerobic respiration is the type of cellular respiration that takes place in the absence of oxygen.

Fermentation is the process of chemical reaction in which sugar gets converted into carbon dioxide and ethanol induced by micro-organisms.

Explanation:

Aerobic respiration is found in all higher animals and plants.

Anaerobic respiration is found in micro-organisms but rarely in higher organisms.

Fermentation is found in bacteria and some other higher animals (muscle cells in humans).

Aerobic respiration take place in the cytoplasm (glycolysis) and mitochondria (Krebs cycle and electron transport chain).

Anaerobic respiration takes places only in the cytoplasm.

Fermentation belongs to the anaerobic respiration and it takes place in the cytoplasm only.

Aerobic respiration produces 36 ATPs per glucose molecule.

Anaerobic respiration produces 2 ATPs per glucose molecule.

Fermentation produces 2 ATPs per glucose molecule.

Aerobic respiration: carbon dioxide and water.

Anaerobic respiration: lactic acid in animals; carbon dioxide and ethanol in plants or yeast.

What part is the cell is a plastid that stores starch?

Answers

Answer:

the answer is

leucoplasts

Match the phrase with the term.

a. How hard the blood pushes on the inside of the blood vessels is called: ___________ .
b. The total amount of blood the heart pumps in one minute is called : ___________.
c. When blood vessels open wider during exercise, they are said to : ___________ .
d. How many times your heart beats in one minute is called : ___________ .
e. The force that can put unhealthy tension on the heart as it is pumping is called : ___________.
f. The amount of blood the heart pumps out in one beat is called : ___________.

1. blood pressure
2. cardiac output
3. dilate
4. heart rate
5. blood pressure
6. stroke volume

Answers

How hard the blood pushes on the inside of the blood vessels is called? BLOOD PRESSURE

The total amount of blood the heart pumps in one minute is called ?

CARDIAC OUTPUT

When blood vessels open wider during exercise, they are said to ?

DILATE

How many times your heart beats in one minute is called ?

HEART RATE

The force that can put unhealthy tension on the heart as it is pumping is called ?

BLOOD PRESSURE

The amount of blood the heart pumps out in one beat is called?

STROKE VOLUME

Which type of cell does the charger best model?
O A. Nerve cell, because it sends electrical signals
O B. Epithelial cell, because it covers surfaces of a body
O C. Guard cell, because it changes in size to open and close a hole
O D. Bone cell, because it is strong and stiff to provide support

Answers

Answer: A

Explanation: The nervous system sends electric signals from the brain to the body to make they move. The charger is similar becuase it sends energy to your devices so they can work.

Which of the following people is most likely to develop varicose veins?

Answers

Answer:

An overweight, elderly woman who spends most of the day sitting. is correct

Explanation:

Can I get some help please

Answers

Answer:

3. Testes and ovaries

4. Vas deferens

5.  Testosterone, estrogen, and progesterone

6. The sperm is released from the testes and is then passed through the epididymis, ductus deferens, ejaculatory duct, and then the urethra.  

Explanation:

How many different types of transport tissue do plants contain

Answers

Answer:

the answer is two types

Explanation:

hope this helps

Answer:

Plants have two different types of 'transport' tissue.

Explanation:

Xylem transports water and solutes from the roots to the leaves, phloem transports food from the leaves to the rest of the plant.

What do you predict would happen if you brought a negatively charged balloon next to an uncharged piece of paper?

The balloon will attract the paper.
The balloon will repel the paper.
Nothing will happen.
The paper will repel the balloon.

Answers

Answer: Option A (the balloon will attract the paper)

Explanation:

I did the exam and option A was correct :)

I hope this helps!

The graph below shows the lung function of test subjects at three different ages who had exposure to ozone gas from the same source and location.
According to the graph, which statement best describes the effects of ozone on human health?

At 0.2 ppm, lung function is worse in subjects older than 20.
At 0.3 ppm, lung function is better in subjects older than 20.
Subjects at age 20 have higher lung function than subjects at age 33.
Subjects at age 27 have lower lung function than subjects at age 20.

Answers

Answer:

B

Explanation:

It's Pretty Easy To Know

At 0.3 ppm, lung function is better in subjects older than 20.

Ozone can cause the muscles in the airways to constrict, trapping air in the alveoli. This leads to wheezing and shortness of breath.

What is the functions of ozone?The ozone layer acts as a shield for life on Earth. Ozone is good at trapping a type of radiation called ultraviolet radiation, or UV light, which can penetrate organisms protective layers, like skin, damaging DNA molecules in plants and animals.There are two major types of UV light: UVB and UVA.However high amount of ozone can cause is a feeling of irritation in the eyes, nose and throat. Some people may also experience respiratory or heart symptoms such as shortness of breath, chest pain, and wheezing.

Hence, B option is correct.

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What will be the economic and social consequences of this loss of biodiversity? Can anyone help please?

Answers

Answer:

economic consequences

Whilst human-made changes to ecosystems have often generated large economic gains, biodiversity loss damages the functioning of ecosystems and leads to a decline in essential services, which may have severe economic consequences, particularly in the longer term.

social consequences

Biodiversity loss can have significant direct human health impacts if ecosystem services are no longer adequate to meet social needs. Indirectly, changes in ecosystem services affect livelihoods, local migration and, on occasion, may even cause or exacerbate political conflict

Explanation:

I hope it helps you

what happens to photosynthesis in different colored lights?​

Answers

They change and absorb

Questions
1.) Both strong acids and strong bases can be very dangerous and can give you a chemical
burn. Name a way that a strong bases may be more dangerous than a strong acid.
2.) Why might a person with reflux (indigestion) feel better after taking a Tums, Rolaid or similar
medicine?
3.) Name a common food that can cause "heartburn" due to the moderate to high pH?
Low
times more basic/alkaline than
4.) A substance with a pH of 12 is
a substance with a pH of 9?
5.) Salty ocean water has a higher pH than fresh water, due in part to the dissolved minerals
from coral, rocks and shells. If a child added lots of seashells to his
fresh water aquarium, give a reason why the fish might die?

Answers

Answer:

A =1

Explanation:

Explain why when you look at a leaf it appears to be green?

Answers

Because the plant absorbs red light most efficiently and the green light is reflected. That is why leaves appear green

The leaf appears to be green because the plant leaf absorbs all the light rays of the sun except the green, and as the green is reflected back to the atmosphere, the plant leaf appears to be green.

What is the reason behind seeing different colors?

Different colors are produced from the sun's light, so when the light is passed through the prism or through the water droplets, due to the scattering of lights, the colors are produced. As the plants' leaves have differing colors such as green, orange, little brown, etc., this is the result of the different photosynthetic pigments such as chlorophyll, xanthophyll, etc . The colors that are absorbed by these are not visible to the eyes, but those that are reflected back are seen.

Hence, the leaf appears to be green because the plant leaf absorbs all the light rays of the sun except the green, which is reflected back and is visible to the eye.    

 

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⦁ Why is Isle Royale an ideal place for scientists to study predator-prey relationships?

Answers

Answer:

The resulting predator-prey relationship has been extensively studied ever since. The island's isolation, the limited presence of humans, and limited quantifiable populations

Explanation:

so they have created an ideal place for studying the relationship.

Find the slope of the line shown on the graph to the right.

Answers

Answer:

2

Explanation:

Find the slope by counting rise/run from (-2,-6) to (1,0). 6/3 = 2.

which of the four muscular chambers of the human heart directly propels blood into the pulmonary circulation?

Answers

Answer:

the right ventricle

Explanation:

right side pumps deoxygenated blood into the pulmonary circulation

The right ventricle is the muscular chamber of the human heart that directly propels blood into the pulmonary circulation.

What is circulation?

The movement of blood through the body's vessels which is basically is brought about by the heart's pumping motion serves to transport nutrients and oxygen.

It occurs to all regions of the body and eliminate waste products from them.

Deoxygenated blood from the right atrium is used up by the right ventricle and pumped into the pulmonary artery, which then transports the blood to the lungs for oxygenation.

After being given oxygen, the blood travels back to the heart through the pulmonary veins, where it enters the left atrium before being pumped into the left ventricle for systemic circulation throughout the body.

Thus, the answer is right ventricle.

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3. A mechanical weathering process in which tectonic forces lift deeply buried rocks upward and
then erosion removes overlying rock and sediment - the net result of which is to remove the
pressure from overlying materials causing the rock to expand and fracture.
O chemical weathering
O erosion
O pressure-release fracturing
O mechanical weathering

Answers

chemical weathering

[WILL GIVE BRAINLIEST]

Which pair of body systems control and coordinate the cells that make up the organism?

A. Nervous & Endocrine
B. Digestive & Circulatory
C. Reproductive & Muscular

Answers

Answer:

The nervous system and the endocrine system

Explanation:

The nervous system and the endocrine system regulate and coordinate body functions by sharing in a unique partnership. Jointly they maintain growth, maturation, reproduction, metabolism and human behavior.

Answer:

Sorry I don't know.

Is this Science?

The fur color of collared lemmings changes to white at a certain time of the year.

a. Explain how the change in fur color is an advantage to collared lemmings. When temperatures rise above freezing, snow melts, which causes changes in the collared lemmings’ habitat.

b. Describe two ways warming temperatures could cause the size of the collared lemming population to decrease.

c. Describe how fur color in the collared lemming population will likely change over time as temperatures increase because of climate change.

Answers

The change in fur color of  collared lemmings is an advantage in the face of rising temperatures because their snow color will make them easily vulnerable to predators.

What is adaptation?

The term adaptation refers to the morphological or physiological changes that an organism undergoes in order to survive efficiently in its environment.

The change in fur color of  collared lemmings is an advantage in the face of rising temperatures because their snow color will make them easily vulnerable to predators when the snow eventually melts.

The rise in temperature will cause physiological changes in the the population of the  collared lemmings which could reduce their population size. Also, predators can now access them more easily as they become more visible.

As time goes on, the snow color of the  collared lemmings will eventually change as the animal will have to take on colors that will enable it to blend again with its new habitat and escape predators.

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The genotype of a person with blood type O negative is _________ for the ABO allele and __________ for the Rh factor allele.

Answers

Answer:

IiIi; Rh-Rh-

Explanation:

Explain the relationship between an atom and an element

Answers

Answer:

A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. ... All isotopes of a particular element have the same number of protons, but can have different numbers of neutrons.

Explanation:

Which of the below options DO NOT require energy to move across the membrane?

Answers

Answer:there is no options below send a picture and I can try to figure it out

Explanation:

which property of transposable elements allows them to contribute to the c-value paradox?

Answers

Answer:

Their copy number can increase from one generation to the next.

10. The ATP made during glycolysis is generated by A. Substrate-level phosphorylation B. Electron transport C. Photo phosphorylation D. Chemiosmosis E. Oxidation of NAD and NADH

Answers

Answer:

A. Substrate-level phosphorylation

Explanation:

Hope it helps!


Glycolysis provides a cell with a net gain of:
a. 18 ATP molecules.
b. 36 ATP molecules.
c. 4 ATP molecules.
d. 2 ATP molecules.

Answers

Answer:

d. 2 ATP molecules.

Explanation:

The net gain from glycolysis is two molecules of ATP and two molecules of NADH. The conversion of pyruvate to acetyl CoA and its metabolism via the citric acid cycle yields two additional molecules of ATP, eight of NADH, and two of FADH2.

How much work do you do when you lift a 100-N child 0.5m?

Answers

Answer:

50 J

Explanation:

Work = F × D

= 100 N × 0.5 m

= 50 Nm / 50 J

what is meant by the terms resolve in gel electrophoresis?

Answers

Gel resolution in gel electrophoresis simply means the degree of separation between the proteins and DNA of different molecular weights.

Gel electrophoresis simply means a laboratory method that is vital for the separation of mixtures of RNA, DNA, or proteins based on their molecular size.

It should be noted that in gel electrophoresis, the molecules that are to be separated are pushed with the aid of an electrical field through a gel that has small pores.

Gel resolution in gel electrophoresis depends on the cross-linking polymer which was used in making the gel and the other materials that provide the gel with the specific desired properties.

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1. ___________________ is used to sustain metabolic activities within the cells, and ________________ is produced as a result of these activities.

Answers

Answer:

oxygen, carbon dioxide

Explanation:

oxidizing agents and reducing agents should be stored close to one another for safety.

Answers

Answer:

False

Explanation:

When segregating chemicals, acids should not be stored with bases, and oxidizers should not be stored with organic materials or reducing agents. Physical barriers and/or distance are effective for proper segregation.

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unlike ancient china and egypt, ancient greece was much more _____. In 1789, what percent of people living in Saint Domingue were slaves?O 60%90%20%50% Whats the summary of Blue by Francesca Lia? What is an amendment?A a change to the ConstitutionB. a preamble to the Constitutionc. an explanation of the Bill of RightsD. an introduction to the Bill of Rights Could someone explain this please? 4 1/2 times 1 3/4 as a mixed fraction in simplest form An amusement park charges $8 for admission and $2 for each ride. Use the graph to find the slope and the y-intercept. Then write an equation for the function that relates the total cost to the number of rides. show your work. Melinda is planning for retirement so she makes monthly deposits of $420 in an account earning 5% compounded monthly for 30 years.(a) Find the amount that Melinda has in the account in 30 years. $?(b) Once she retires she will make monthly withdraws on the account for 20 years. Assuming that once she starts withdrawing on the account, she will earn 4% compounded monthly. Find the amount that she can withdraw every month. $? Which of the following functions' graphs are shifted down 6 units when compared to the parent function f(x) = x? Note that there may be other transformations as well, so the question is whether or not a particular transformation of the parent includes a vertical shift down of 6 units.A) g(x) = 2(x - 6)B) g(x) = x/6C) g(x) = 2(x + 6)D) g(x) = x - 6E) g(x) = x + 6F) g(x) = 3x + 6G) g(x) = 6xH) g(x) = 3x - 6 for the boys first to answer get 100 brainliest EARTH SCIENCE a student conducts an experiment to see how music affects plant growth the student obtains four identical plants each one is potted in the same type of soil and receives the same amount of sunlight and water each day plant a listens to classical music for three hours each day plant b listens to rock music for three hours each day plant c listens to country music for three hours each day plant d does not listen to any music at all. Based on the experiment in the scenario which visual aid would be most helpful in showing the change in the plants height over time? A. A pie chart B. A timeline C. A bar graph D. A line graph Government deficits tend to increase during A. periods of increased financial uncertainty. B. recessions and booms. C. periods of below or aboveaverage growth. D. periods of war and recession. no podemos evitar el cambio climtico a menos que todos Short-run macroeconomic equilibrium is when (Hint: Be careful! Be sure to return to the general definition of equilibrium): Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a. Firms have no incentive to change how much they produce b. Households have bought as much as they want c. The government is content with the level of employment d. Spending is equal to consumption (AE = C) 7.49,7 49/50,7.5% from least to greatest For a field trip 23 students rode in cars and the rest filled three buses. How many students were in each bus if 203 students were on the trip? hey! needing some help with this Which type of rock is loosely held together? Graphite Igneous Metamorphic Sedimentary An immediate effect of the voyage of Vasco de Gama was the A. Beginning of direct trade between Portugal and India. B. Growth of strong nations in Europe. C. Discovery of rich gold kingdoms in Africa. D. European Exploration of America. What is the simplest form of (37)2?42426363979 7614