The probability of extinction via predation is particularly high when:
a. Predator and prey coevolved over long periods of time.
b. Prey populations are stressed by additional environmental factors.
c. Predators are a new arrival to the prey's habitat.
d. The prey species is long lived and has a low birthrate.
e. B, C, and D.
E
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Living transmitters of an infectious organism from one host to another are called ________.
Fill in the blank(s) with the appropriate word(s).
Kelps are a form of what group of protists?
a. brown algae b. slime molds c. water molds d. ciliates e. dinoflagellates
In addition to oncogenes, changes in what other gene is likely involved in cancer development?
a. proto-oncogenes b. pre-oncogenes c. post-oncogenes d. dys-oncogenes e. tumor suppressor genes
Flowers that make pollen, but not ovules, lack
A) carpels. B) stamens. C) sepals. D) filaments. E) petals.