The most important experimental result that suggested to Watson and Crick that DNA was in the form of a helix was

a. the finding of Chargaff that DNA always had equal amounts of A and T and equal amounts of G and C.
b. Griffith's results with transformation.
c. the discovery that DNA is wound around histone proteins.
d. X-ray data from Rosalind Franklin .
e. understanding DNA replication.


D

Biology & Microbiology

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A. can be used to identify Gram-negative bacteria. B. can be used to identify Gram-positive bacteria. C. uses gas chromatography to analyze fatty acid methyl esters. D. requires that cells be grown under standardized conditions. E. All of these choices are correct.

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In most protostomes, the ____ is the developmental origin of the body cavity between the gut and muscles of the body

wall.

a. schizocoelom b. mesoglea c. archenteron d. enterocoelom e. blastopore

Biology & Microbiology

Which is most closely related to the hagfishes?

A. Lancelets B. Tunicates C. Lampreys D. Cartilaginous fishes

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Conservation biology includes

a. a survey of biological diversity. b. a look at the evolutionary origins of diversity. c. ecological considerations of diversity. d. an effort to maintain biodiversity. e. all of these.

Biology & Microbiology