What is the most abundant gas in the air that we breathe?

A) carbon dioxide
B) oxygen
C) hydrogen
D) water vapor
E) nitrogen


Answer: E) nitrogen

Biology & Microbiology

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What features are associated with the leaf epidermis? Check all that apply.

_____ Guard cells. _____ Trichomes. _____ Cuticular wax. _____ Pores. _____ Tracheids.

Biology & Microbiology

Which tissue type attaches to bones and is

responsible for producing body movements?

a. skeletal muscle b. neural c. epithelial d. smooth muscle e. connective

Biology & Microbiology

If parents with genotypes Gg have one child with a recessive genetic disorder, gg, what is the chance that their second child will develop the genetic disorder?

A. 15% B. 25% C. 45% D. 35%

Biology & Microbiology

Kin selection is defined as:

a. selection for a behavior that raises an individual's own chances of survival or reproduction, as well as those of a related individual. b. selection for a behavior that lowers an individual's own chances of survival or reproduction, but raises those of a relative. c. selection for a behavior that lowers an individual's own chances of survival or reproduction, but raises those of another individual who may be reciprocally altruistic. d. selection that operates not just on one individual, but on all of its relatives as well. e. None of the above is correct.

Biology & Microbiology