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Leno4ka [110]
3 years ago
10

Which of the following statements about extinction is true? Choose one: A. Recent species are disappearing so slowly that resear

chers suggest our present time is another mass extinction. B. Some species may become extinct because they evolve into a new species. C. At least five mass-extinction events have occurred during the last 500 million years. D. The movement of tectonic plates does not often cause mass extinctions, because all species move along with the plate.
Biology
1 answer:
JulsSmile [24]3 years ago
4 0

Answer:

C. At least five mass-extinction events have occurred during the last 500 million years.

Explanation:

  • The history of mass extinct is related to the five mass extinctions that are caused over by the 350 million years n which many species have disappeared in there short geologic time.
  • A massive extinction is caused in the Permian Triassic extinction event i.e about 250 mn years ago which on an estimate has killed 90% of the species.
  • The Cretaceous–Paleogene extinction event that occurred over 66 million years ago is known to have wiped out the dinosaurs and many other species.  
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Jupiter has no _______, while Uranus, with a spin axis tiled 98 degrees, has the most extreme ones.
Kamila [148]

Answer:

The correct answer is

Option C. Season.

Explanation:

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3 years ago
When assisting a child with ventilation:
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7 0
3 years ago
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Julli [10]

Multiply 5730 years by 2 since two half-lives have gone by for carbon.

<u>Explanation</u>:

The half-life of a radioactive isotope depicts the measure of time that it takes half of the isotope in an example decay. On account of radiocarbon dating, the half-existence of carbon 14 is 5,730 years  

The half-life of carbon-14 is 5730 years.  

In this manner, after  

1 half-life there is 50 % = 1/2 of the first amount left.  

2 half-lives there is 25 % = 1/4 of the first amount left.  

25% is two half-lives.  

Every 50% of life requires 5730 years.  

So two half-lives require 2 × 5730

6 0
3 years ago
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Answer:

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