The evolution of __________ was crucial in the

evolution of plants from aquatic to terrestrial
environments.
a. roots
b. leaves
c. stems
d. stomata
e. all of these


Answer: e

Biology & Microbiology

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Now extinct, tooth parts of ____ are abundant as fossils dating from the early Paleozoic to the early

Mesozoic era. These jawless fishes are considered to be the earliest vertebrates with bonelike structures.

a. acanthodians b. conodonts c. osteolepiforms d. placoderms e. ostracoderms

Biology & Microbiology

The nuclear condition (ploidy) that club fungi

spend most of their lives in is

a. diploid. b. haploid. c. dikaryotic. d. mycokaryotic. e. triploid.

Biology & Microbiology

The state during which muscle cells require more ATP than cellular respiration can provide is known as ____

a. summation b. tetanus c. paralysis d. lactic acid debt e. oxygen debt

Biology & Microbiology

Shrews have been documented to travel across frozen lakes and establish populations on previously uninhabited islands. The low level of genetic diversity in the new populations is the result of

A) genetic drift. B) a population bottleneck. C) coevolution. D) the founder effect. E) assortative mating.

Biology & Microbiology