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Black_prince [1.1K]
3 years ago
14

Describe geographical isolation and competition

Biology
1 answer:
zmey [24]3 years ago
3 0
Geographical isolation usually refers to <span>two populations of the same species being separated due to some type of physical barrier. This separation of population </span>occurs<span> when a body of water or land forms and divides a habitat. </span>Geographic isolation<span> of a species also can </span>occur<span> when animals migrate to an isolated island.</span>
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Explain the relationship between crossing over and genetic variation
7nadin3 [17]

Answer:

When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. It is obviously another source of genetic variation in offspring.

Hope this helps you. Do mark me as brainliest.

8 0
3 years ago
This is the unequal distribution of ions across a cell membrane.
Nady [450]

Answer:

Concentration gradient

Explanation:

Concentration gradient of the ions across the membrane generates the membrane resting potential.

Concentration gradient means that there is unequal distribution of the ions on different sides of membrane. For example, the concentration of K ions is much higher within the cell then out of the cell. Opposite is with the Na ions. When ions move from the area of their higher concentration to the are with the lower concentration, we say they move down the gradient or diffuse (no energy required). On the other hand, movement of ions against their gradient means that this process requires energy and involves protein pumps.

5 0
3 years ago
You will come to find that everything that makes life possible on earth is all _____.
Georgia [21]
The answer is interconnected. You will come to find that everything that makes life possible on earth is all interconnected. It is just like the way all the human activities and necessities for the everyday life are all interconnected to nature.
5 0
3 years ago
According to the cell theory, which describes cells?
zysi [14]

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A is incorrect because organisms like bacteria and amoebas are unicellular, or have 1 cell.

B is incorrect because cells are specialized: nerve cells and muscle cells do not share the same function.

C is incorrect because inanimate objects are not alive and do not have cells.

D is correct because cells reproduce by mitosis, creating copies of themselves.

8 0
2 years ago
In dna replication, the new strand of dna that is synthesized in one continuous piece .
leva [86]

In DNA replication, the new strand of dna that is synthesized in one continuous piece is called the leading strand

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2 years ago
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