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Paul [167]
3 years ago
7

Why is facilitated diffusion necessary?

Biology
2 answers:
lawyer [7]3 years ago
6 0
It allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins. The plasma membrane needs these molecules in order for the cells and the body to function
il63 [147K]3 years ago
4 0

Answer:

to cross the plasma membrane.

Explanation:

Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.

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Explain in detail the life cycle of the metamorphosis of amphibians.
ANTONII [103]

Answer:

Amphibians begin their lives as eggs, The few eggs that get fertilized, and survive will hatch in 7-9 days. After the eggs of an Amphibian hatch they are called Tadpoles. Tadpoles breathe through gills like fish. ... Metamorphosis is the final process that changes the amphibian from tadpole to adult.

Explanation:

1. I studies this in 7th grade and remeber every single bit of it (monte vista)

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6 0
3 years ago
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vekshin1

Answer:

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Explanation:

4 0
3 years ago
Which organisms are not examples of an adaptive radiation?
gavmur [86]

Answer:

Option B, Mammals and reptiles in the post-dinosaur age.

Explanation:

Adaptive radiation is mechanism through which species evolve very fast from common single ancestors. In simple words two different species are said to have evolved through adaptive radiation when they have descended from a single lineage. This is not the case with mammals and reptiles.  

Generally in adaptive radiation, a species evolve when it faces new environmental challenges due to change of habitat or area. For example mammals have evolved from dinosaurs.  

Hence, option B is correct

5 0
3 years ago
Plzzzzzzzzzzzzzzzzzzzzzzzzzzz help i only need help with B everything eles i can do my self
Nina [5.8K]

Answer:

I believe that it is the lettuce.

Explanation:

it is the fist thing in the graph so it is the start/producer of the chain.

4 0
3 years ago
Compare the two servings below. Which of the following will the serving on the left provide in greater quantity than the serving
k0ka [10]

I'm guessing the answer would be protein because I know meat falls in the protein category in which ice cream would have a lesser quantity

Hope this helped!

7 0
3 years ago
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