What Evidence Suggests That Life Arises Relatively Easily

question 25

Multiple Choice

What evidence suggests that life arises relatively easily?

• A)Life is currently present in extreme environments like deep ocean volcanic vents.
• B)Life was present on Earth soon after the end of the heavy bombardment.
• C)All organisms on Earth use DNA as their genetic material.
• D)Tardigrades, small animals, can survive exposure to the near- vacuum of space.

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Definitions:

Penetration

The process of entering or piercing through a substance, structure, or barrier.

Escape Hypothesis

A theory suggesting that some cellular organelles, such as mitochondria and chloroplasts, originated from bacteria that once entered a host cell and lived symbiotically.

Regressive Hypothesis

A theory suggesting that more complex systems or structures have evolved from simpler precursors through a process of simplification or loss of features.

Virus-first Hypothesis

A theory proposing that viruses existed and evolved before the emergence of cellular life forms.