Question

cenozoic era - 65 mya to current
mammals dominated the newly open environments
250,000 thousand years ago humans evolved
can you put evolution of humans on your timeline?
remember 1 mm is equal to 4.5 mya
therefore humans have been on the planet for 0.05mm.
can you draw this line on your paper? if you have a very fine pencil, the mark is still 0.5mm wide.
value: 7
a massive diversification of plants and animals that occurred 545 mya:
a. proterozoic heyday
b. cambrian explosion
c. paleozoic eruption
d. jurassic expansion
e. devonian diversification

Explanation:

The Cambrian explosion was a significant event in Earth's history. It occurred approximately 541 million years ago (mya) and was characterized by a rapid diversification of life forms. During this period, there was a massive emergence of new animal phyla and species, leading to a wide variety of complex organisms. This event is often referred to as the "Cambrian explosion" because of the sudden and extensive nature of the diversification.

Answer:

B. Cambrian explosion