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natulia [17]
3 years ago
14

Why is it important to have constants in an experiment

Biology
1 answer:
Pie3 years ago
8 0
Its important because it help you make sure the experiment is done right, making sure the variables are giving the right results. 

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Which of the following molecular movements is due to diffusion or osmosis? a) The sodium-potassium pump pumps three sodium ions
MrMuchimi

Answer:

The correct answer is  b) When a plant cell is placed in concentrated salt water, water moves out of the cell.

Explanation:

Osmosis is the movement of solvent molecules from an area of less concentration of solute to high concentration of solute to equalize the concentration of both the side of the cell.

So water will move outside the cell when any cell will be placed in a concentrated salt water because the concentration of solute is high in salt water and low inside the cell.

Therefore when a plant cell is placed in salt water the osmosis of water takes place from inside to outside the cell. So the right answer is b.

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D. the maintenance of homeostasis within the body system.

Explanation:

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Is Suvival SelfishIs Suvival Selfish?
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And it makes sense that some people, seemingly surviving by dumb luck, would feel they acted selfishly in not trying to help those less fortunate. It definitely is selfish to act that way; to put one's own survival ahead of others

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