3 years ago

Evesa

1 answer:

8 0

Answer:

Active uptake (which I think you mean active transport) is important when the concentration gradient is against that of a certain substance, so it doesn't cross the membrane through diffusion or passive transport. It is sometimes necessary if a substance needs to move across a membrane but can't do so due to electrical charge or that there is a substance on the other side of the membrane preventing diffusion.

Explanation:

You might be interested in

Starch molecules are broken into smaller units known as

forsale [732]

Starch molecules are hydrolyzed into smaller units known as---- Simple sugars.

Hope this helps<3

3 0

3 years ago

Photosynthesis is a very complex process that occurs when sunlight and _________ are present????

Ilia_Sergeevich [38]

Sunlight and h20 and co2 are present

6 0

2 years ago

Mendels pea plants how do either purple or white flowers . This means that the plants A. Can self-pollinate B.have two recessive

WINSTONCH [101]

I believe the answer B,have two recessive traits.

6 0

3 years ago

Help quickly please ill mark brainliest!

Zigmanuir [339]

Answer:

1. homo

2.hetero

3.homo

Explanation:

4 0

2 years ago

What membrane protects the brain and spinal cord that circulates cerebral spinal fluid (csf) g?

nata0808 [166]

Meninges are membranes that cover and protect the brain and spinal cord.
There are three layers of meninges: Dura mater (closest to the bone), Arachnoid loosely around the brain, Pia mater is closely attached to the brain and spinal cord surface.

5 0

3 years ago