In lakes and ponds, oxygen concentrations are lowest in the
A) benthic zone.
B) littoral zone.
C) limnetic zone.
D) profundal zone.
A
Biology & Microbiology
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Which of the following is found in RNA but not in DNA?
A. Adenine B. Ribose C. Thymine D. Uracil E. Ribose AND Uracil
Biology & Microbiology
The water from rivers eventually flows into
a. aquifers. b. groundwater. c. oceans. d. surface water runoff.
Biology & Microbiology
Life emerged from the oceans 400 million years ago
a. True b. False Indicate whether the statement is true or false
Biology & Microbiology
All types of cells are capable of all of the following EXCEPT:
a. metabolism. b. movement. c. growth. d. reproduction. e. energy conversion.
Biology & Microbiology