If you lay your forearm along a table, you can rotate it so that your hand changes from a palm-down to a palm-up position. This is possible because your radius and ulna join at a
A) ball-and-socket joint.
B) hinge joint.
C) pivot joint.
D) ligament.
Answer: C
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The radula functions to:
a. filter feed. b. assist in reproduction. c. scrape algae off of rocks. d. assist in osmoregulation. e. secrete the shell.
When step "d" is completed, the two DNA molecules produced will be
a. identical to each other but not to the parent DNA. b. identical to the parent DNA but not to each other. c. different from each other and the parent DNA. d. identical to each other and to the parent DNA. e. identical to each other and almost the same as the parent DNA.
Traits which by logic should show less genetic variation because of their close association with reproduction fall into which category?
A) life-history traits B) behavioral traits C) physiological traits D) morphological traits
An example of a prokaryotic organism is
A. bacteria. B. protozoa. C. moss. D. fern.