The term ________ variable refers to one of two variables involved in an experiment, in which neither variable can be isolated as having an effect
A) blind
B) statistical
C) multiple
D) confounding
D
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An area had no previous community and had no existing soil at first, but then living things started occupying the area. This situation would be called ________
A) biological magnification B) primary succession C) climax community D) secondary replacement
By examining a karyotype, it is possible to determine
A) which of two related plant forms is a gametophyte, and which is a sporophyte. B) the sex of an animal. C) the age of a fungus. D) A and B only E) A, B, and C
__________________________occurs when a trait has been repurposed during evolution.
Fill in the blank(s) with the appropriate word(s).
A chemical agent that dissolves lipids can damage
A) cells. B) bacterial endospores. C) enveloped viruses. D) nonenveloped and enveloped viruses. E) cells and enveloped viruses.