This animal is acoelomate, has a gastrovascular
cavity, and light-detecting eyespots. This
animal is ___.
a. a planarian
b. a tapeworm
c. an earthworm
d. a fluke
e. more than one of these
A
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Which of the following biomes has the highest variation in annual temperature?
A) subtropical deserts B) arctic tundra C) temperate forests D) temperate grasslands E) boreal forests / taiga
Upon antigenic stimulation, CD8+ T cells differentiate into helper T cells
Indicate whether the statement is true or false.
ATP
a. can be produced by endocytosis. b. is the by-product of the biosynthesis of organic compounds such as glucose. c. is produced in greatest amounts during anaerobic respiration. d. is released in aerobic respiration. e. is released in anaerobic respiration.
The sun's energy is produced by:
a. nuclear fission reactions. b. nuclear fusion reactions. c. electromagnetic radiation. d. ultraviolet radiation. e. infrared radiation