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olasank [31]
3 years ago
13

How many years ago did the earth cool enough for solid rocks to form ?

Biology
1 answer:
Anestetic [448]3 years ago
3 0
<span>As soon as the crust became </span>cool enough<span> not to remelt, convection driven plate ... as early as 4.2 billion </span>years ago<span>, only 400 million years after the </span>Earth<span> formed.</span>
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Which of the following occurs when a cell repairs a double-strand DNA break by the process of nonhomologous end joining? 1.The D
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Answer:

option 3

Explanation:

In non-homologous end joining, the break ends are directly ligated together without the need for a homologous template unlike the homologous repair. this form of repair uses short homologous sequences of DNA termed microhomologies to direct repair and these microhomologies are seen as single-stranded overhangs found on the ends of double-strand breaks. When the overhangs are perfectly compatible, NHEJ ligates and repair the break. When these overhangs are not compatible, imprecise repair leading to deletion of nucleotides can also occur which is much more common .

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3 years ago
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If the grass contains 100,000 kcal of energy, the energy a fox will obtain from eating a bird is 1,000 kcal.

<h3>What is Calorie?</h3>

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The organisms only derive 10 percent of the energy when the feed on others. In this case, the grass has 100,000 kcal of energy which when eaten by the bird will be 10 percent which is 10,000 kcal. When the fox eats the bird it becomes 1,000 kcal.

Read more about Calorie here brainly.com/question/1061571

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2 years ago
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