Which animals have a cartilaginous skeleton?
a. sharks
b. reptiles
c. humans
d. houseflies
e. earthworms
a
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Pigeon breeding is an example of
a. natural selection. b. evolution. c. artificial selection. d. adaptation. e. mutation
Non-native species can have important effects on biological communities by ________
A) preying upon native species only B) competing with native species for resources only C) reducing biodiversity only D) All of these are effects that non-native species can have on biological communities.
Which of the following statements regarding Ehrlichia is FALSE?
A. It usually causes a spotted rash similar to Rocky Mountain spotted fever. B. The organism reproduces inside the host's phagosomes. C. It is transmitted by ticks. D. It is an emerging infectious disease. E. It has three stages: elementary body, initial body, and morula.
What would a graph of internal lung pressure compared to atmospheric pressure look like during one inhalation/exhalation cycle in a frog?
A. A B. B C. C D. D E. E