Multiple Choice
What is the primary goal of evolutionary classification in biology?
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21. Evolution
Introduction to Evolution and Natural Selection
Multiple Choice
Which of the following was likely an important factor in triggering the Cambrian Explosion?
A
The development of photosynthesis
B
Increased oxygen levels in the oceans
C
The extinction of dinosaurs
D
The formation of Pangaea
Verified step by step guidance1
Understand the Cambrian Explosion: The Cambrian Explosion refers to a period approximately 541 million years ago when there was a rapid diversification of life forms on Earth.
Consider the role of oxygen: Increased oxygen levels in the oceans are believed to have been a crucial factor in the Cambrian Explosion, as oxygen is essential for the metabolism of complex organisms.
Evaluate the development of photosynthesis: Photosynthesis, which produces oxygen as a byproduct, was a key process that contributed to the accumulation of oxygen in the atmosphere and oceans.
Analyze the extinction of dinosaurs: The extinction of dinosaurs occurred much later, around 66 million years ago, and is not related to the Cambrian Explosion.
Examine the formation of Pangaea: Pangaea was a supercontinent that formed long after the Cambrian Explosion, so its formation was not a factor in triggering this event.
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