There are planktonic forms of every major group of animals
a. True
b. False
True
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Diatoms flourished during the Miocene, likely because increased volcanism meant oceans were enriched in the
element ____________________, which diatoms use to build their skeletons. Fill in the blank(s) with the appropriate word(s).
Although the sun influences the tides, it’s effect is considerably less than the effect of the moon.
Indicate whether the statement is true or false
A number of European countries have similar or even higher standards of living than the U.S. and consume less energy than Americans do.
Answer the following statement true (T) or false (F)
Which of the following is NOT a factor cited to explain periodic long-term variations in the climate of
the Earth? a. tilt of the Earth's axis b. shape of the Earth's orbit c. speed of rotation of the Earth on its axis d. wobble of the Earth's axis e. All are factors.