Which of the following is a character in
phylogeny?
a. number of digits
b. DNA sequence for a gene
c. amino acid sequence of an enzyme
d. number of petals
e. all of these
E
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A carbon atom with six protons, seven neutrons, and six electrons has a mass number of
a. 6. b. 7. c. 12. d. 13. e. 19.
As you climb a mountain, why do the biomes change?
A. The air is thinner. B. The latitude is changing. C. More rain falls in a rain shadow. D. Some animals live better at higher elevations. E. It is colder.
Which of the photographs in the above figure
represents the angiosperms? a. moss b. fern c. conifer d. monocot e. all of these
A digestive tube is best defined as ________
A) the compartment in which an animal digests its food B) a tube-shaped digestive compartment with either one or two openings C) a tube-shaped digestive compartment that has two openings and through which food moves in one direction D) a digestive compartment that conducts both chemical and mechanical digestion