The smallpox vaccine uses the ________ virus.
Fill in the blank(s) with the appropriate word(s).
vaccinia
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The secondary consumers in this food web is(are) the __________
a. spider b. beetle c. possum d. spider and possum
In the 1960s, evolutionary biologists identified protein polymorphisms using ____, which allowed them to infer how
much genetic variation exists within populations.
a. genome sequencing b. gel electrophoresis c. artificial selection d. polymerase chain reactions e. DNA microarrays
Which of the following is characteristic of mosaic development?
a. The cells of the adult are very different from each other. b. The fate of adult cells is predetermined in embryonic founder cells. c. Adult cells are richly interspersed with proteins. d. Embryonic cells have a wide range of possible developmental patterns. e. Embryos have a wide range of morphologies, but all look identical as adults.
Which of the following is not a characteristic of deuterostomes?
a. the blastopore becomes the anus b. determinate cleavage c. they include echinoderms and chordates d. indeterminate cleavage e. three embryonic germ layers