Which of the following is a phototroph?
A) a tree
B) a mushroom
C) bacteria growing on decomposing matter
D) an earthworm
E) a person
A) a tree
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Adaptive radiation would be described by:
a. the dinosaurs going extinct. b. coelecanths. c. Darwin’s finches. d. rats and warfarin. e. all of these.
In comparing smooth and cardiac muscle, which one of the following best describes the differences between the two muscle types?
A) Smooth muscle is voluntary, whereas cardiac is involuntary. B) Both lack muscle filaments, but cardiac muscle has sarcomeres. C) Cardiac muscle requires periods of relaxation, whereas smooth muscle is always in a state of partial contraction. D) Cardiac muscle filaments are arranged in bundles, whereas smooth muscles lack filament bundles. E) Cardiac muscle contracts slowly compared to smooth muscle.
An example of homologous structures is the wing of a bat and the:a
arm of a human. b. wing of a beetle. c. tail of a whale. d. leg of a chimpanzee. e. dorsal fin of a shark
Which of the following is not a way to reduce your ecological footprint?
A. turn down the thermostat in the winter B. refrain from watering the lawn C. live in a smaller home D. drive an energy-efficient car E. eat more beef