Which of the Following Factors Contributes to About 30 Percent

question 32

Multiple Choice

Which of the following factors contributes to about 30 percent of all cancer deaths?

• A)tobacco use
• B)radiation
• C)family history
• D)alcohol use

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Definitions:

Gametic Isolation

A type of prezygotic barrier where the gametes (egg and sperm) of two different species are unable to fuse or recognize each other, preventing fertilization.

Sympatric Species

Species that occupy the same or overlapping geographical areas but remain genetically distinct without interbreeding.

Temporal Isolation

A mechanism of reproductive isolation that occurs when two species breed at different times of the day, season, or year, preventing mating.

Habitat Isolation

A form of prezygotic barrier where two species live in different habitats and rarely, if ever, encounter each other.