Which of the following differences between warm-water and cold-water species is not directly caused by differences in water temperature?
A) Cold water organisms reproduce later and less frequently than those in tropical waters.
B) Floating organisms are physically smaller in warm waters than in colder waters.
C) Total biomass of plankton in the tropics is far less than that found in high-latitude waters.
D) Tropical organisms grow faster and have a shorter life expectancy than those in colder water.
E) Warm-water species often have ornate plumage which is absent in the larger cold-water species.
C
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a. cultural landscape b. digital divide c. man-land theory d. physical geography e. environmental determinism
The Columbia River dam system has benefited many people, but it has also ____.
A. sharply increased populations of invasive salmon B. sharply reduced populations of wild salmon C. sharply reduced populations of herring D. inhibited migration patterns of trout E. inhibited reproductive cycles of common carp
The type of cell division in which resulting cells contain one chromosome from each pair is
called _______. Fill in the blank(s) with the appropriate word(s).
These gymnosperms made their appearance in the Triassic and became very widespread:a
angiosperms d. seed ferns b. cycads e. A and C c. horsetail rushes