What is the most effective anti-drag body plan?
a. Torpedolike
b. Horizontally compressed
c. Vertically compressed
d. Disk-shaped
ANS: A
Drag is the resistance to movement and is determined by the frontal area, body contour, and surface
texture. It increases geometrically with increasing speed. Information can be found in the section
Fishes Are Successful Because of Unique Adaptations.
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A) CO2 B) nitrogen C) oxygen D) hydrogen
Aging populations will present tremendous challenges for poor countries because
A) today the elderly are cared for by their families. B) there are fewer elderly in poor countries. C) of the increase in young people in the population. D) retirees from rich countries may migrate to poor countries.
A good heat conductor is a
A. poor insulator. B. good insulator. C. neither of these D. not enough information
Which of the following processes can cause land surface uplift (i.e., build mountains)?
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