Air is continuously forced through tubes that
thread through vascularized tissue in a pair of
inelastic lungs in
a. some fish.
b. amphibians.
c. birds.
d. reptiles.
e. some small mammals
C
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Due to biological magnification, which of the
following have the highest concentration of a chemical herbicide?
a. grass- the dominant primary producer b. cow- an herbivore c. grasshoppers - an herbivore d. mice - predators of butterflies e. hawk - predators of mice
What characteristic was the key change in the origin of human and human-like species?
a. changes in vision b. changes in teeth and jaws c. bipedalism d. changes in brain size and development e. behavioral changes
Which region of the Earth receives the least amount of solar radiation during the winter solstice?
A. Southern Hemisphere B. Northern Hemisphere C. equatorial regions D. between 30° North and 30° South E. All of the Earth's regions receive the same amount of solar radiation during the winter solstice.
Which organism is the most photosynthetically productive living organism that forms underwater forests over 100 meters long?
A. diatoms B. brown algae C. golden algae D. red algae E. green algae