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Luba_88 [7]
3 years ago
9

The type of reproductive barrier that occurs when two species mate but produce sterile hybrids is referred to as _______________

___
Biology
1 answer:
son4ous [18]3 years ago
3 0
Post zygotic barrier 
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4)
Andreyy89

Answer:

A

Explanation:

Wdg

3 0
3 years ago
What is a protein channel?
aliya0001 [1]
<span>Protein channels are needed to transport substances because it accelerates the transport process. Very few substances enter or leave cells without being attached to a transport protein. Different types of substances require different types of proteins to transport them. Protein channels transport water or ions downwards and ATP-powered pumps transport molecules or ions upwards. ATP generates energy to transport the molecules upwards. Gravity is used to transport the water molecules downwards. So, in a nutshell, if substances need to be transported from the top of the body downward, the force of gravity is used to transport the substances down. If substances need to be transported upwards, ATP, a coenzyme, is used to generate energy to transport the substance upwards</span>
5 0
3 years ago
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Many flowers produce nectar. What is a purpose of nectar? to remove excess water to shield petals from damage to attract birds a
Aleks04 [339]
To attract bees and insects
4 0
3 years ago
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The diagrams show objects' gravitational pull toward
RSB [31]

Answer:

Explanation:

Look at the formula

F = G * m1 * m2/r^2

G is a constant. It has no effect on the answer.

A: The force of gravity operates no matter what the distance and masses are. It just might be pretty small. Not A

B: B is true as stated.

C: The opposite is true. Therefore C is not true.

D:

6 0
2 years ago
Im stuck on the first 2 answers
Softa [21]

Answer:

Trees in and around Austin are uprooted from heavy wind

Explanation:

Goose island is already on the coast so it's used to salt water.

The birds won't become extinct in one day.

It takes a while for a river to be completely destroyed naturally.

8 0
3 years ago
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