Which of the following is characteristic of animals?
a. heterotrophy.
b. autotrophy.
c. photosynthesis.
d. both b and c.
d
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The exoskeleton of arthropods
a. grows with the animal. b. is not waterproof. c. contains chitin. d. is important for the animal's digestion. e. has no functional use.
Saturated fatty acids _____
A) have double bonds between carbon atoms of the fatty acids B) are the principal molecules in lard and butter C) are usually liquid at room temperature D) are usually produced by plants
Florence Nightingale compared disease rates and other statistics for soldiers versus civilian populations. This is an example of __________.
A) descriptive epidemiology B) case reporting C) analytical epidemiology D) controlled experimentation
A keystone species that is a predator will
A) maintain the species diversity in a community. B) harvest prey species to extinction. C) help many of its prey reproduce. D) reduce the diversity of the community.