In the Years Following His Journey on the Beagle, Darwin

question 30

Multiple Choice

In the years following his journey on the Beagle, Darwin pursued his ideas of evolution by studying __________.

• A) artificial selection
• B) animals he found on subsequent journeys
• C) the works of Alfred Russel Wallace
• D) all of these

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Definitions:

Cryptochrome

A class of flavoproteins that are sensitive to blue light and are involved in the circadian rhythms and photoperiodism in plants and animals.

Clock Protein

A component of the circadian clocks of organisms, involved in maintaining the biological rhythm according to a 24-hour cycle.

Photoperiodic Response

The physiological reaction of organisms to the length of day or night, affecting processes such as flowering in plants and breeding in animals.

Photoperiodism

The physiological reaction of organisms to the length of day or night, often affecting flowering and reproduction.