The highest point on a reef is called the:
a. reef crest.
b. reef flat.
c. reef front.
d. back reef.
e. leeward edge.
A
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Which of the following describes the earliest
protist found in the fossil record?
a. single-celled, free-swimming, asexual reproduction, red alga b. multi-celled, stationary, asexual reproduction, red alga c. multi-celled, free swimming, sexual reproduction, red alga d. multi-celled, stationary, sexual reproduction, red alga e. single-celled, stationary, asexual reproduction, red alga
The Hardy-Weinberg rule is
a. useful in determining the extent to which a sexually reproducing population is evolving. b. used to predict when genetic drift will occur in a sexually reproducing population. c. useful in determining the extent to which polyploidy is occurring in specific plant populations. d. used to predict when specific groups of organisms will become extinct. e. all of these.
The balance between osteoblast and osteoclast activities is an example of homeostasis and is regulated by the action of two hormones.
a. true b. false
Some RNA molecules have been discovered that can
A) form primitive cells. B) duplicate lipid molecules. C) act as enzymes. D) convert organic molecules to protocells. E) degrade proteins.