Which group of organisms forms the base of the energy pyramid in a pelagic marine ecosystem?
A. phytoplankton
B. bacteria
C. zooplankton
D. sea grass
Answer: A
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The three largest language families in Southeast Asia are
A) Dravidian, Altaic, and Tai-Kadal. B) Austronesian, Austro-Asiatic, and Tai-Kadal. C) Austronesian, Afro-Asiatic, and Uralic. D) Korean, Japanese, and Austronesia. E) Indo-Iranian, Celtic, and Austronesia.
Which location marks the cutbank on this image?
A) Location A B) Location B C) Location C D) Location D
The early Earth was not hospitable to life as we know it because of meteorite bombardment, an oxygen-poor atmosphere, and the molten state of the planet for the first few million years
Indicate whether this statement is true or false.
The average salinity of the oceans is about ________ parts per thousand (‰).
A. 35 B. 40 C. 30 D. 37 E. 45