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jolli1 [7]
3 years ago
15

Why are the leaves in the cactus plant modified to form spines?​

Biology
1 answer:
Ludmilka [50]3 years ago
5 0

Answer:  Leaves in a cactus are modified into spines to reduce loss of water from leaves by transpiration. Then the plant makes from the process of photosynthesis which is performed by the stem.

Explanation:

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How many cell divisions would you think need to occur during the life of an onion? With this thought, describe the marvel of the
zvonat [6]

Answer:

The number of cell divisions is too large to even estimate.

Explanation:

Think, for every cell to be formed, a parent cell needed to divide. on top of that, for every parent cell is the result of another parent cell. Think of how small a cell is, and think of how many cells are in the onion.  The fact that onions are still onions is incredible, because a DNA mutation occurs at a very high rate during cell division.  When DNA divides, it sometimes doesn't divide evenly, resulting in too much DNA is one cell, and not enough in another.   Science has proven that the composition of DNA is what makes humans humans, trees trees, and onions onions.  The fact that onions have withstood the millions upon millions of DNA mutations while still remaining a species, is astonishing.

<em>BRAINLIEST PLS!!!</em>

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3 years ago
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You have to put a photo rq

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3 years ago
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scientists think that the flagellum and the light sensitive spot work together. suggest how this might happen
artcher [175]

the flagellum helps the cell to move through water. Scientists think that the flagellum and the light-sensitive spot work together to increase photosynthesis. Light sensitive spot detects light.

I researched this! Hope it helps!

5 0
2 years ago
How can organism's be so unique if the nucleotides making up DNA are all the same between organism's?​
Masja [62]

Every organism is unique, even though the nucleotides making up DNA are all the same, because the structure is different in every organism. In other words, it's just the order in which nucleotides are placed that differs each organism from one another.

4 0
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Why would natural selection not occur without genetic variations in species?
Mumz [18]

If you do not have variations to be selected by natural or sexual selection on their superior abilities to survive and reproduce successfully then nothing can be naturally selected against the immediate environment.
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