Which of the following is part of the urinary system,
not the reproductive system?
a. ureter
b. urethra
c. vas deferens
d. vas efferens
e. epididymis
Answer: a
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The evolution of initiation of limb development in tetrapods is best explained by
A. a new gene mutation. B. the modification of an existing gene for a new function. C. homoplastic convergence. D. gene duplication and divergence. E. conserved genes.
The organism in the above photograph has
which of the following structural systems? a. cartilaginous b. bone c. hydrostatic d. chitinous e. none of these
How did Seymour Benzer use deletion mapping to construct fine-scale maps of the rII region of the T4 bacteriophage genome?
What will be an ideal response?
The saguaro is a giant cactus that is found in desert regions of Arizona. This is information about the cacti's ________
A) habitat B) niche C) biosphere D) succession