Explain why the development of the amniote egg was so significant in the evolution of the
reptiles. What will be an ideal response?
The amniote egg allowed the developing organism to bypass a larval stage that needed to live in
water. Therefore the land-dwelling organisms were able to inhabit many ecosystems on the land
without being dependent on water for part of their reproductive cycle. The organism that hatched
was self-reliant and looked like a miniature of the adult; presumably the hatchlings were able to
take care of themselves immediately. This was a crucial adaptation at the end of the Paleozoic; as
Pangaea was being assembled, wetlands were disappearing and great stretches of arid, desert-like
regions were created.
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Predator-prey relationships are beneficial at the ____ level, but harmful at the ____ level.
A. individual; population B. population; individual C. individual; species D. individual; landscape E. landscape; species
Why do "shadows" result in TEM images?
A) Light does not pass through the atoms, resulting in shadows. B) Electrons are stopped by atoms, resulting in shadows. C) There are no objects for the electrons to hit, which results in shadows. D) Electrons pass through the atoms, resulting in shadows.
Annual temperature ranges near South Georgia Island are low despite their high latitude because
A) the climate is dominated by dry, frigid air masses year-round. B) they are influenced by maritime environments. C) higher than average precipitation for the climate type mitigates against the extreme cold weather. D) higher elevation mitigates against the extreme cold events that otherwise occur at these latitudes. E) the island is oriented on sunward side of large topographic features.
Which air mass has its source region in the southwestern United States?
A. mP B. mT C. cT D. cA E. cP