The northern elephant seal, Mirounga angustirostris, suffered a significant population bottleneck in the late nineteenth century, when hunting reduced their population size to as few as 20 individuals
It has since rebounded to several tens of thousands. The related southern elephant seal, M. leonine, was not hunted as intensively. What prediction can you make about the relative levels of heterozygosity in populations of these two species?
Much genetic variation would have been lost in the northern elephant seal population as a result of such a severe bottleneck, so heterozygosity will be very low. The southern elephant seal, in contrast, should still have significant genetic variation and correspondingly higher heterozygosity.
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In the reaction A- +B ?A + B-, ____
A. molecule A is oxidized and molecule B is reduced. B. molecule A is reduced and molecule B is oxidized. C. molecules A and B are both reduced. D. molecule A is oxidized and molecule B is unchanged. E. molecules A and B are both oxidized.
The flexor joints, the most moveable joints in the vertebrate skeleton, are lubricated by fluid that allows bones to slide
easily as the joint moves.
Indicate whether the statement is true or false.According to the _____, modern humans originated in, and migrated out of, East Africa
a. haplotype data of mitochondrial DNA sequences b. haplotype data of Y chromosome sequences c. out-of-Africa model d. multiregional model e. fossil record
If seed production had never evolved, which organisms would be missing in today's landscape?
A) bryophytes and ferns
B) ferns and gymnosperms
C) gymnosperms and angiosperms
D) angiosperms and bryophytes