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25 April, 00:56

Identify the statement that is true about mass extinctions.

Choose one:

A. The mass extinction of dinosaurs occurred at the Cretaceous/Paleogene boundary.

B. The mass extinction of over two-thirds of the species on the Earth was the result of large volcanic eruptions in Hawaii.

C. Mass-extinction events are times in the Earth's history when few species evolve.

D. A mass extinction may happen when a comet or asteroid impact starts a chain of worldwide volcanic eruptions.

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Answers (2)
  1. 25 April, 01:18
    0
    D

    Explanation:

    Mass extinction is defined as an occurrence that cause a rapid extinction of a large number of species across the earth within a short period of time.

    Factors that causes mass extinction are change in climatic condition, massive volcanic eruption, and effects of asteroids.

    When asteroid impact can ignite a chain of worldwide volcanic eruption which effect can lead to a mass extinction of different species of animal.
  2. 25 April, 03:16
    0
    A. The mass extinction of dinosaurs occurred at the Cretaceous/Paleogene boundary.

    Explanation:

    The most known extinction is the associated with the Dinosaurs, which happened at the Cretaceous/Palogene boundary (66 million years ago), although there is still a huge discussion on the causes of such extinction (comet/asteroid, changes in sea level, volcano activity).

    Such event meant the dissappearing of two-thirds of the living species on Earth.
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