Which of the following scientist-discoveries is mismatched?
A. Watson, Crick, Wilkins, and Franklin-DNA structure.
B. Avery, MacLeod, and McCarty-DNA is the genetic material.
C. Meselson and Stahl-mechanism of DNA replication.
D. Griffith-chromosomes.
D. Griffith-chromosomes.
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Which animal became numerous and widespread by using sonar to enable a high level of activity in the dark?
A. bats B. whales C. owls D. dolphins E. shrews
What is the genotype of the females that gave rise to these progeny?
Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a male homozygous for all three mutations. The offspring are as follows:
A) px+sp cn / px sp+cn+
B) px+sp cn+ / px sp+cn
C) px+sp+ cn+ / px spcn
D) pxsp cn+ / px+ sp+cn
E) insufficient data
The volume of air left in the lungs after maximum
exhalation is indicated by a. A. b. B. c. C. d. D. e. E.
Root nodules contain ______, which can ______.
a) Azotobacter, fix N2 b) Bitrosomonas, nitrify NH3 c) Rhizobia, fix N2 d) Bacillus, denitrify NO3