When Is a Species Is Considered to Be Critically Endangered

question 19

Multiple Choice

When is a species is considered to be critically endangered?

• A) If there is a 50% probability of extinction in 5 years or 2 generations, whichever is longer
• B) If there is a 50% probability of extinction in 10 years or 3 generations, whichever is longer
• C) If there is a 20% probability of extinction in 20 years or 3 generations, whichever is longer
• D) If there is a 20% probability of extinction in 20 years or 5 generations, whichever is longer

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Definitions:

Chyme

The semi-fluid mass of partly digested food that moves from the stomach to the small intestine.

Anabolism

The constructive part of metabolism concerned with the building up of complex molecules from simpler ones.

Catabolism

The breakdown of complex molecules within an organism to form simpler ones, together with the release of energy; destructive metabolism.

Gastroenterology

A branch of medicine focused on the digestive system and its disorders.