__________ covers and protects the outer surfaces of primary plant parts. Fill in the blank(s) with the appropriate word(s)


Epidermis

Biology & Microbiology

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Which one of the following gases was not a component of the simulated atmosphere in the Miller-Urey experiment?

A. hydrogen B. water vapor C. oxygen D. methane E. ammonia

Biology & Microbiology

An airborne chemical that is used to communicate with members of the same species is called a ____

Fill in the blank with the appropriate word.

Biology & Microbiology

Scientists are always thinking about ways to

improve experimental design. In the text's potato chip experiment, which of these might do so? a. show a different movie b. exclude teenagers as group members c. collect uneaten chip remains and weigh them for both groups d. provide free drinks e. use a smaller theater

Biology & Microbiology

The presence of the strongest competitors in the

center of a group of animals may qualify the group for status as a(n) a. altruistic society. b. selfish herd. c. kin group. d. dominance hierarchy. e. sexual selection society.

Biology & Microbiology