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Elan Coil [88]
3 years ago
6

Which one is the answer

Biology
1 answer:
Westkost [7]3 years ago
4 0
First ask your question.


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Cells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell memb
aniked [119]

Answer:

B (active transport using ATP)

Explanation:

Movement of substances normally occur in the direction of concentration gradient/difference i.e. the difference in concentration of a substance across a membrane. Letting molecules diffuse or pass down their concentration gradient does not require energy but pumping those molecules against gradient requires energy in form of Adenosine triphosphate (ATP). This process is called Active transport.

In order to perform certain cellular processes, cells need to move substances from their surroundings into the cell across their cell membrane. Moving this substances against the concentration gradient between the cell membrane and its extracellular fluid requires energy (ATP).

An example is the sodium-pottasium pump employed by animal cells in which they expend energy to move K+ molecules into the cell and Na+ molecules outside the cell against the concentration gradient of their cell membrane and extracellular solution.

5 0
3 years ago
In a prokaryotic cells most ribosomes are
solniwko [45]

Answer:

<h2>Proteins even make up most of your hair. ... While a structure such as a nucleus is only found in eukaryotes, every cell needs ribosomes to manufacture proteins. Since there are no membrane-bound organelles in prokaryotes, the ribosomes float free in the cytosol. Ribosomes are found in many places around a eukaryotic cell.</h2>

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<em>This isn't my answer, BUT, you can read more about the prokaryotic cells and their functions, and what they're made up of here at this website: </em>

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5 0
3 years ago
Read 2 more answers
What evidence is there that the universe is expanding? Explain.
Vsevolod [243]

This is evidenced by Doppler shift effect. This is the phenomenon where waves that are coming from an object that is accelerating towards your direction are heard at a higher frequency than that of objects moving away from you. This is the same for light (which also has wave-like properties). When observing distant galaxies, astronomers discovered that they all showed to be redshift (change in the frequency of light towards red color). This means that all galaxies are moving away from each other because the universe is expanding.   






6 0
3 years ago
How do you think your lungs move when you inhale?
IgorC [24]

Answer: When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.

hope it help you or someone else if yes happy for you if it a no sorry

8 0
2 years ago
A vase sits on a shelf. what form of energy does it possess?
krok68 [10]

Answer;

Potential energy

Explanation;

-An object can store energy as the result of its position.This stored energy of position is referred to as potential energy.

-The energy an object has because of its position, rather than its motion. An object held in a person's hand has potential energy, which turns to kinetic energy; the energy of motion, when the person lets it go, and it drops to the ground.

7 0
3 years ago
Read 2 more answers
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