Geologic Time: Early Life & Extinction Events — Quiz

Question 1

Which graph best illustrates how biodiversity has been affected by mass extinctions in Earth’s past?

Revolt · Accepted Answer

Image with description A simple line graph with the x-axis labeled "Time" and the y-axis labeled "Diversity." The graph shows a repeating pattern of upward-sloping lines followed by sharp drops, forming a jagged, rising, step-like pattern as it moves from left to right.

Question 2

Which evolutionary innovation helped vertebrates survive and diversify following major environmental changes during the Paleozoic Era?

Revolt · Accepted Answer

amniotic eggs

Question 3

What evolutionary event enabled the formation of eukaryotic cells?

Revolt · Accepted Answer

endosymbiosis

Question 4

Which event marked the rapid diversification of marine life into forms that included hard shells and complex eyes?

Revolt · Accepted Answer

Cambrian Explosion

Question 5

Match each event with its effect on biodiversity.

Revolt · Accepted Answer

rapid diversification of multicellular marine life|95 percent decrease in marine biodiversity|loss of all non-avian dinosaurs

Question 6

Scientists generally agree that the Cretaceous-Paleogene mass extinction was caused by an asteroid impact. Which factor most likely explains the success and diversification of mammals and birds after that event?

Revolt · Accepted Answer

Adaptations like warm-bloodedness, hair and feathers, and rapid reproduction helped them survive and evolve.

Geologic Time: Early Life & Extinction Events — Quiz Answers

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