Ozone Gas in the Lower Part of the Stratosphere Filters

question 41

Multiple Choice

Ozone gas in the lower part of the stratosphere filters out how much of the sun's harmful ultraviolet (UV) radiation?

• A) 10%
• B) 20%
• C) 33%
• D) 67%
• E) 95%

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Definitions:

Venom Genes

Genetic sequences that code for the production of venom, a toxic substance used by some animals for defense or to capture prey.

Defensin Gene

A gene that codes for defensins, which are small cysteine-rich cationic proteins involved in the innate immune response.

Gene Recruitment

Gene recruitment refers to the co-option of a particular gene or network for a totally different function as a result of a mutation. The reorganization of a preexisting regulatory network can be a major evolutionary event.

C-Opsins

A class of light-sensitive proteins found in the photoreceptor cells of the retina, involved in the visual systems of various organisms.