Consider the cladogram shown. Which pair of species shares the greatest number of derived characters (synapomorphies)?

A. 1 and 3
B. 6 and 4
C. 6 and 3
D. 6 and 5
E. 2 and 3


Answer: D

Biology & Microbiology

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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?

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Because of its function, this hormone is often called interstitial cell-stimulating hormone

A) GnRH B) LH C) FSH D) inhibin

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Some internally fertilized eggs develop and hatch outside the mother's body. What is this developmental strategy called?

A. oviparity B. marsupial development C. placental development D. vivipary

Biology & Microbiology