Analogous traits:
a. are shared by two or more species because some evolutionary process (usually natural selec-tion) has independently fashioned the similar traits in each species.
b. are found in two or more species because those traits are from a common ancestor.
c. Both of the above.
d. Neither of the above.
A
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Over time, the relationship between a pathogen and a naà¯ve susceptible population tends towards
A) the extinction of the host. B) the extinction of the pathogen. C) a balance between host and pathogen such that both are maintained. D) the extinction of either the host or the pathogen.
All invertebrates have phagocytic cells, but lack antibodies
a. True b. False
In radiation therapy, cancer cells are killed by ____
a. carbon b. radium c. iodine d. thallium e. nitrogen
The nitrogenous base found in RNA but not in DNA
is a. adenine. b. cytosine. c. guanine. d. uracil. e. thymine.