The double helix model of DNA structure was proposed by
A. Watson and Crick.
B. Griffith.
C. Avery.
D. Franklin.
E. Chargaff.
A. Watson and Crick.
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How many chromosomes are in human gametes?
a. 22 b. 23 c. 24 d. 21
What were the long-term responses of each population following the removal of the mice? a. At about year 40, the deer mice population began to re-establish, but then crashed quicklyafter that
b. At about year 40, the deer mice population began to re-establish, and quickly grew back to itsoriginal population size. c. There was no apparent impact on any other population size. d. Both b and c above.
In comparison to rocky coasts, intertidal organisms living on sandy or muddy beaches
A) experience greater variability in salinity. B) experience greater variability in temperature. C) are more likely to be attached to the substrate. D) are more likely to move back and forth with the tides.
The conversion of gaseous nitrogen (N2) to the ammonium ion (NH4+) occurs during
A. denitrification. B. photosynthesis. C. nitrogen fixation. D. ammonification. E. nitrification.