This figure suggests that adding more and more nutrients over time will result in
A) an increase in species diversity.
B) an increase in species evenness.
C) a decrease in overall productivity.
D) a decrease in species diversity.
D
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Toxic substances accumulate through natural trophic flow of an ecosystem.
Answer the following statement true (T) or false (F)
Amino acids, dipeptides, and sugars are transported from intestinal epithelial cells into circulation. Lipids are first transported from the intestinal epithelium into _____
A) smooth muscles that make up the core of the villi of the intestinal epithelium B) the lymphatic system C) the liver D) the gallbladder
In prokaryotes, repressor proteins: (Select all correct choices)
A. bind with DNA and prevent transcription. B. bind with activators and prevent transcription. C. are part of the mechanism of positive regulation. D. are part of the mechanism of negative regulation.
Familial Down syndrome is a result of
A. inversion. B. deficiency. C. gene duplication. D. translocation