Crop rotation occurs where different types of plants are grown on the land each season. If you had no access to chemical fertilizers, which of the following would be best to include in your rotation cycle?
A) beans B) cotton C) corn D) tobacco
Answer: A
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Carrie Buck is significant in the history of genetics because she ____
a. was a well-known advocate for eugenics b. became the first woman geneticist c. was sterilized after the U.S. Supreme Court determined she was feebleminded d. discovered how to genetically modify corn to be resistant to herbicides e. is the author of the first biography of Gregor Mendel
The guard cells surrounding a stomata respond to changes in the environment, such as
a. humidity. b. light. c. wind. d. all of these
By age 50, the basal metabolic rate is ____ what it was in childhood
a. double b. 80?85% c. 50?60% d. the same as e. 25?30%
Two species regularly come into contact and form hybrids that have higher fitness than either of the parental species. What are some likely consequences of regular hybridization between these species? Check all that apply.
A. complete reproductive isolation of the two original species B. evolution of a third species C. reinforcement of prezygotic isolating mechanisms D. extinction of one or both of the parental species. E. increased gene flow between the parental species