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ElenaW [278]
3 years ago
15

A/An _______ exists when different concentrations of a substance exist on either side of a membrane.

Biology
1 answer:
Alecsey [184]3 years ago
4 0

Answer:It is known as a concentration gradient which in diffusion will always flow from ares of high concentration to areas of low concentrations  

So i believe the answer to this is A.

Explanation:

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3 0
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3 0
3 years ago
Which statement describes one feature of Rutherford’s model of the atom? The atom is mostly empty space. The atom cannot be divi
Dovator [93]

Answer: The atom is mostly empty space.

Explanation:

Before to Rutherford, the accepted model for the atom was Thomson's model:

The atoms were a positive sphere, with electrons occupying space in it".

This was called the "plum pudding model".

Then came Ernest Rutherford, and he created a model where the atoms are mostly empty space (void) with a positive charged nucleus (really compressed in the center), and the electrons were orbiting around it.

Then the correct option is that the atom is mostly empty space.

5 0
3 years ago
Read 2 more answers
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