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Ivanshal [37]
3 years ago
15

1) If you place the corner of a paper towel into a droplet of water, the water moves into the

Biology
2 answers:
nignag [31]3 years ago
7 0

Answer:

D: Both cohesion and adhesion.

Have a great day! :)

deff fn [24]3 years ago
7 0

Answer:

The correct answer is (D) Both cohesion and adhesion.

Explanation:

Cohesion and adhesion is the properties of water which allow it to stick to different surface. Therefore they provide stickiness in water molecule.

Adhesion is the force that allows water to be stuck and soaked in a paper towel and move through capillary action in the paper towel and cohesion is the force that stick two water molecule together. These two forces together allow water molecules to stick a surface and move up against gravity.

Therefore, If we place the corner of a paper towel into a droplet of water, the water moves into the paper towel due to both cohesion and adhesion. So the correct answer is (D) Both cohesion and adhesion.

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Answer:To put dates on events in evolutionary history, biologists count how many mutations have accumulated over time in a species’ genes. But these “molecular clocks” can be fickle. A paper in the 28 September Physical Review Letters mathematically relates erratic “ticking” of the clock to properties of the DNA sequence. Researchers may eventually use the results to select which genes make the best clocks.

Although mutations in DNA are rare, they are crucial for evolution. Each mutation in a gene changes one small piece of a protein molecule’s structure–sometimes rendering it non-functional and occasionally improving it. The vast majority of mutations, however, neither hurt nor help, often because they affect an unimportant part of their protein. Such a “neutral” mutation usually dies out over the generations, but occasionally one proliferates until virtually every individual has it, permanently “fixing” the mutation in the evolving species.

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