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Phoenix [80]
4 years ago
10

Scientists know what the first cells were like based on fossil evidence. a. True b. False

Biology
1 answer:
Alika [10]4 years ago
7 0

Answer:

The correct answer will be-True.

Explanation:

Scientists have tried to understand and explain the emergence of life by collecting the evidence that lived in the past which turned into fossils.

The scientists have predicted that earth was formed around 4.5 billion years ago but the first evidence of life belonged to 3.5 billion years ago. The earliest undisputed evidence was a microscopic organism which used sunlight, water and oxygen to synthesize the food and was known as cyanobacteria. These cyanobacteria formed fossils known as "stromatolites".

Recent studied found fossils of bacteria which were formed around 4.5 billion years ago when the earth was still hot and the climate was unstable.

Thus, it is true that fossils act as evidence to support that what were the first cell looked like.

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Answer:

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Given to Kepler's second law, this means that when the planet is farther, the orbital velocity must be lower (because the line connecting the planet to the Sun is longer, so it can cover the  same area moving less), while when the planet is closer to the Sun, the orbital velocity must be higher (because the line connecting the planet to the Sun is shorter, so it will cover less area if moving at the same speed.

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