Which of these is a way that the sexual life cycle increases genetic variation in a species? 1. by allowing crossing over
2. by allowing an increase in cell number
3. by conserving chromosomal gene order
4. by decreasing mutation frequency

Which is one example of a phenotypic change that is not genetic

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

What problem would a person most likely have if her kidney did not work correctly?