.The cell membrane acts like a filter allowing necessary materials in and waste out, while keeping the organelles and cytoplasm in. This means that a cell membrane is selectively

Answers

Answer 1

Answer: Permeable

Explanation:

The cell membrane is the outermost covering around the animal cells but it is also surrounded by the cell wall in the case of the plant cells. The cell membrane plays an important role in the cell that is it allows the entry of only certain substances like ions, molecules, atoms within the cell and only allows the exist of certain substances out of the cell. This is the selective permeability of the membrane. This process occurs through osmosis in which the desired molecules move from higher to lower concentration. Also it helps in maintaining the balance of nutrients and water within the cell. This helps in getting rid of the waste outside the cell. It provides the protection to the organelles and cytoplasm in the cell against the external injury caused by the external stressor outside the cell like water, pressure, pathogen, and others.


Related Questions

Science, please help and thank you!!

Answers

Swings hope this helps

What is the relationship between atmospheric
pressure and vapor pressure at the boiling point of
a liquid?

a. The atmospheric pressure is equal to the
vapor pressure at the boiling point.

b. The atmospheric pressure is less than the
vapor pressure at the boiling point.

C. The atmospheric pressure is greater than
the vapor pressure at the boiling point.

d. Both Band C are correct.

Answers

correct me if I’m wrong but I believe that the answer A

What change releases energy.

Answers

Answer:

When a substance changes states, it requires energy when it goes to a higher energy state and releases energy when it goes to a lower energy state. Gas has a higher energy than liquid and liquid has a higher energy than solid. The three state changes from a lower energy to a higher energy are: solid to liquid: fusion. liquid to gas: vaporization

heelp me pls :P ( rando words )

Answers

The answer the neutral atoms

Which statement is true about this fuel cell?
It is self contained like a battery.
It continually needs to be charged.
It has an electrolyte that acts as a salt bridge.
It does not require the input of fuels from an outside source.

Answers

The statement which is true about the fuel cell is that It has an electrolyte that acts as a salt bridge.

What is Fuel cell ?

A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity.

The fuel cell has an electrolyte that acts as a salt bridge.

As electrolytes are nothing but the salts which are present at the inner side of the U-Tube considered as Salt bridge present in fuel cell.

In this way, Fuel cell has electrolyte that acts as a salt bridge.

learn more about salt bridge here ;

https://brainly.com/question/14969258

#SPJ1

Colin decided to investigate soil erosion by water. He measured rates of erosion on
model hills made of soil, rock, and sand. Which of the following was the test
(independent) variable?

Answers

Answer:

i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...

the steepness of the models hillside

or

the rate of erosion on the hills

so the answer is either...

the amount of water sprayed on the hills

or

the type of material used to construct the model hills

but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)

Explanation:

What happends when you put m&ms in warm water for 2-3 minutes ​

Answers

Answer:

The m & m logo floats off of it. Its a fun experiment. I did it before

Explanation:

Hope that helped

Ammonia (NH3) dissolved in water is heated in a beaker. If initially there had been 60 grams dissolved in 100 grams of water, what would happen if the temperature reached 90℃ and why? A. The solution would become supersaturated and the ammonia would all remain dissolved . B. The solution would become saturated but the amount of ammonia dissolved would remain the same . C. about 50 more grams of ammonia would be able to dissolve as the solution has become unsaturated . D. about 50 grams of ammonia would come out of solution as the temperature caused the solubility to decrease .

Answers

Answer:

C. About 50 more grams ammonia would be able to dissolve as the solution has become unsaturated

Explanation:

From the question, we have;

The mass of ammonia dissolved in water = 60 grams

The mass of the water solvent which dissolves the ammonia = 100 g

The temperature to which the ammonia water solution is raised = 90°C

Therefore, given that the solubility of a solute in a solvent increases with temperature, when the temperature is raised, we have, that the solution will more unsaturated and will be able to dissolve more ammonia, therefore, option 'C' is the most correct option that corresponds with the relationship of temperature and solubility

I need help with this question please asap I would really appreciate it

Answers

Answer:

I think c

Explanation:

Will award brainliest! Between which two ionization energies would you expect to see the biggest jump for calcium? A. 11-12
B. 12-13
C. 13-14
D. 14-15

Answers

answer:lettter B that is answer

What controls the movement of material between the inside of the cell and the outside world?

Group of answer choices

Nucleus

Cell membrane

Cytoplasm

Vacouoles

Answers

The answer is Cell membrane

Answer:

Cell membrane

Explanation:

Which ion concentration does the pH scale measure? How long is the scale?

Answers

7 which is neutral ranges from 0-14

how many years can carbon dioxide stay in the atmosphere formed

Answers

Once it's added to the atmosphere, it hangs around, for a long time: between 300 to 1,000 years. Thus, as humans change the atmosphere by emitting carbon dioxide, those changes will endure on the timescale of many human lives.

If 2 moles of salt is dissolved to form 1 liter of solution, what is the molarity of the solution?

Answers

Answer:

2M

Explanation:

Molarity refers to the molar concentration of a solution. It can be calculated by using the formula as follows:

Molarity (M) = number of moles (n) ÷ volume (V)

Based on the information provided in this question, 2 moles of salt is dissolved to form 1 liter of solution. This means that n = 2mol, V = 1L

Molarity = n/V

Molarity = 2/1

Molarity = 2M

I have to re ask this but pls help me I don't have a lot of time

Answers

Answer:a

Explanation:

Answer:

Hello there!

If i'm doing this correctly it is A (125 g).

Hope that helped, if I wasn't correct feel free to tell me.

Have a great day!

A student makes observations about a piece of copper. Which
observation describes a chemical property of the copper? (*hint: anything
relating to "measurements" of something is a physical property) *
A. it has a mass of 63.546 grams
B. corrosion occurs when it is exposed to air
C. it has a density of 8.96 g/cm^3

Answers

Answer: b

Explanation:

Which of the following is a nonrenewable energy source that comes from the remains of dead
organisms?
a. Gasoline
b. Solar power
c. Geothermal heat
d. Hydroelectricity

Answers

Answer:

Gasoline

Explanation:

Coal, oil, and gas are all fossil fuels made from the remaisn of dead organisms.

Write a balanced equation for the complete combustion of propane gas, C3H8, with
oxygen, O2, to form carbon dioxide, CO2, and water, H2O?

Answers

Answer:  

Explanation:

Balancing Carbon atoms on the right side,

Balancing Hydrogen atoms on the right side,

Balancing Oxygen atoms on the left side,

The reactants are on the left side of the reaction:

Propane and oxygen are the reactants.

The products are on the right side of the reaction:

Carbon dioxide and water are the products.

forgive me if im incorrect or leaving things out

Through photosynthesis, plants use the energy in sunlight to convert water and
carbon dioxide into sugar and oxygen. Has a chemical or physical change occurred?
Explain your answer.

Answers

Answer:

chemical change occured

Which type of a reaction is best represented by the equation - AB + CD → AD + BC?

Answers

Answer:

AB + CD → AD + BC

Explanation:

This is a double displacement reaction. It is also known as precipitation reaction.

Can mixtures and compounds be separated into their elements? If so which?

Answers

Answer:

The individual components of a mixture can be physically separated from each other. Chemical compounds are very different from mixtures: The elements in a chemical compound can only be separated by destroying the compound.

Different substances have....
A.the same properties
B. different properties
C.similar properties
D.all properties​

Answers

Answer:

Different properties

Explanation:

They are different.

The double bonds in an aromatic ring are not fixed in position as in an alkene. The electrons are considered to be ____ and are delocalized around the ring.

Answers

Answer: The double bonds in an aromatic ring are not fixed in position as in an alkene. The electrons are considered to be in conjugation and are delocalized around the ring.

Explanation:

Chemical compounds that have conjugated planar ring systems where there are delocalized pi-electron clouds are present in place of individual alternate and single bonds.

This means that electrons present in a double bond of alkene are in conjugation.

Therefore, we can conclude that the double bonds in an aromatic ring are not fixed in position as in an alkene. The electrons are considered to be in conjugation and are delocalized around the ring.

Answer:

In resonance

Explanation:

Got it right on Acellus.

Please help me with this homework

Answers

Answer:

Explanation:

Melting example:

Melting chocolate

Freezing example:

Freezing water to ice

Boiling example:

Water boiled in a kettle

Condensation example:

Steam from your bath/shower condenses onto the mirror

Hope this helps :)

3. Some of the reagents used in this lab are easily confused: such as persulfate (S208?)

and thiosulfate (S20:2). A student inadvertently switched these reagents, adding the

persulfate to beaker A and thiosulfate to beaker B. How would this affect the results?

What would the student observe with respect to the mixture in beaker A?

Answers

Answer:

Different compounds are formed.

Explanation:

Due to this switching of chemicals, the result of both beakers will be different because the chemicals react with the different solution in the beaker. The composition of both chemicals are different from one another which produces different compounds or products when they are mixed with the solution so we can say that this switching of chemicals will definitely affect the results of the experiment. The student will observe the formation of different compounds and different colour of the solution.

Please help me with this

Answers

Answer:

no se

ablar inglés losiento princesa

por que todo me sale en inglés?

Explicación?:

Please help with q2

Answers

A. It is counterproductive
B. Vinegar
C. Ammonia

Please give me Brainliest

A) Vinegar is an Acid solution while, Ammonia is a basic solution, so when they react they form a neutral solution,

Therefore this is a neutralization reaction

B) The lower the pH value of a solution, the more acidic it is, and vise versa for basic,

In the table Vinegar has the lowest pH value, of 3. Therefore Vinegar is the most acidic in the table

C) The higher the pH value of a solution, the more basic it is

In the table Ammonia has the highest pH value of 12. Therefore Ammonia is the most basic in the table

Happy to help :)

If you need any more help, you can ask me

C + O2 CO2
1. When solid carbon reacts with 64.0 g of oxygen gas to form carbon dioxide, no carbon or oxygen is left over. How much carbon is reacted if 88.0 grams of carbon dioxide is produced? A 24.0 g B 64.0 g C 88.0 g D 112.0 g

Answers

no. of mole = 88 ÷ ( 12 + 2(16) )

= 2 mol

mass of C = 2 × 12

= 24g ( A )

given the equation, N2H4 + N2O4 -> N2 + H2O, how many moles of N2)=O4 are needed to react with 3.5 moles of N2H4

Answers

Answer:

Explanation:

I think you mean

2N2H4 + N2O4 ==> 3 N2 + 4H2O

The equation says that for Every mol of N2O4, you need 2 moles of N2H4.

1/2 = x/3,5       Multiply both sides by 3.5

3.5*1 / 2 = x

1.75 = x

Therefore you need 1.75 moles N2O4 are needed for 3.5 moles of N2H4

A rigid container of oxygen has a pressure of 3.5 atm and a temp of 713K, what is the pressure at 273K?

Answers

Answer:

Explanation:

This is most easily solved using Gay-Lussac's Law, which relates temperature and pressure as follows:

[tex]P_{1} T_{1} =P_{2} T_{2}[/tex]

According to Gay-Lussac's law, the pressure of oxygen gas at 273 K is 1.34 atmospheres.

Gay- Lussac's law is defined as a gas law which states that the pressure which is exerted by the gas directly varies with its temperature and at a constant volume.The law was proposed by Joseph Gay-Lussac in the year 1808.

The pressure of the gas at constant volume reduces constantly as it is cooled till it undergoes condensation .Given by P₁/T₁=P₂/T₂ which on substitution gives P₂=3.5×273/713=1.34 atm.

Thus, the pressure of oxygen gas at 273 K is 1.34 atmospheres.

Learn more about Gay-Lussac's law,here:

https://brainly.com/question/2683502

#SPJ2

Other Questions
Have you changed a babys diaper before? What was the reason for the people of South Sudan deciding to be independent nation Find the missing number in the proportion.23 over 50 = ___ over 100 Please Help!!! I'll Give Best And Brainliest if it lets me! Help me :D :d !!!!!! Suppose it is known that 23% of students at a certain college participate in a textbook recycling program each semester. Complete parts (a) and (b) below. a. If a random sample of 40 students is selected, do we expect that exactly 23% of the sample participates in the textbook recycling program? Why or why not? Choose the correct answer below. A. We expect that exactly 23% of the sample participates in the textbook recycling program, because that is the percentage of students that participate in the program regardless of sample or population size B. We expect that exactly 23% of the sample participates in the textbook recycling program, because a sample always has the same statistics as the population C. We do not expect that exactly 23% of the sample participates in the textbook recycling program. 23% is a population statistic and you cannot know anything about a sample from the population D. We do not expect that exactly 23% of the sample participates in the textbook recycling program. We do expect that the sample proportion will be close to the population proportion, but it will vary by the sample error from sample to sample b. Suppose we take a sample of 400 students and find the sample proportion participating in the recycling program. Which sample proportion do you think is more likely to be doser to 23% the proportion from a sample size of 40 or the proportion from a sample size of 400? Explain your reasoning. Choose the correct answer below A. The sample with size 40 will be closer to 23% because a smaller sample size has a smaller standard error B. The sample with size 400 will be closer to 23% because a larger sample size has a smaller standard error. C. The sample with size 400 will be closer to 23% because a larger sample size has more variation, D. The sample with size 40 wil be closer to 23% because a smaller sample size has loss variation What is the measure of n?624nmn =[?] What is the total cost to the nearest cent? $14.30 watch; 6.75% tax Using the data above, what would be the independent variable? Type of coke (Diet Coke or Coca Cola) Height of Explosion Trial number or Number of Mentos? CHOISIS LE MOTS INTERROGATIF SELON LE SENS: Attention aux accents.1. vas- tu en vacances cet t ? En France.2. fait-on des crpes ? Je ne sais pas. Je n'ai pas de recette.3. cote cette jupe ? 25 euros.4. le film commence -t- il ? 9 heures.5. s'appelle ton meilleur ami ? Jean Pierre.6. de bonbons mangez-vous ? Un paquet.7. vont-il en Italie? La prochaine semaine.8. vas-tu? a va bien, merci.9. Luc parle avec un accent franais ? Parce qu'il est franais.10. vous parlez italien? Non, je ne parle pas italien. Je parle anglais et franais.11. ? C'est mon livre de franais.12. est votre nationalit? Je suis suisse.13. ge avez -vous ? J'ai 32 ans. Write an equation of the line that passes through (-4 , 2) and is parallel to the line y = 1/4 + 1SOLVE MY QUESTION PLEASE!!ILL PUT YOU IN BRAINLEST!! Which of the following increases transpiration? A air around the leaf with high humidity. B air molecules around the leaf with kess kinetic energy. C an obsence of light falling on the leaf. D water molecules in the leaf with more kinetic energy. Philip made $1,155 in 15 days. Let "m" represent the amount of money that Philp made each day. If Philip made the same amount of money each day, how much did he make in one day. what are symptoms of ulcer John Deere is a manufacturer of agriculture equipment. Deere supplies replacement parts to dealerships across the globe. John Deere has begun utilizing technology so it can identify the geographic location of the parts. This information is available to dealerships and is especially useful in reducing equipment downtime. Agriculture equipment owners can have their machines repaired with replacement parts in a shorter amount of time than before the use of the tracking technology. This is an example of a phenomenon referred to as the _______. 21 years ago Alvin was 11 times older than Tomio. The sum of their present age is 54. What is the lowest level of organization of the biosphere, or the one thathas the fewest members? whats 1/2 mineus 1/3 PLEASE HELP 20 POINTS1 Which parallelograms have congruent diagonals?only squares squares and rectangles squares and rhombuses squares, rectangles, and rhombuses2. Which parallelograns have perpendicular diagonals?only squaressquares and rectanglessquares and rhombuses squares, recangles, and rhombuses PLEASE HURRY!!!! WILL GIVE BRAINLYEST!! The probability of landing on green when spinning a spinner is 1/5. Choose the likelihood that best describes the probability of this event.A. ImpossibleB. Neither likely nor unlikelyC. UnlikelyD. Likely