Which of the following is true with respect to oligotrophic lakes and eutrophic lakes?

A) Oligotrophic lakes are less subject to oxygen depletion.

B) Rates of photosynthesis are lower in eutrophic lakes.

C) Eutrophic lake water contains higher concentrations of nutrients.

D)Sediments in oligotrophic lakes contain larger amounts of decomposable organic matter.

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#Question id: 1751

#XL - Q Biochemistry

Which of the following is characteristically produced by the Th2 CD4 cells which provide help for antibody production, but not by Th1 cells?

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#Question id: 5522

#XL - T Zoology

In reptiles, birds, and mammals, mesoderm is made by invagination and involution into the

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#Question id: 3792

#XL - Q Biochemistry

Strain introduced by unwinding DNA at the replication forks is relieved by

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#Question id: 3609

#XL - T Zoology

In humans, the dominance relationship between the A and B alleles of the ABO blood group gene is an example of

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#Question id: 10572

#XL - T Zoology

In 2005, the United States had a population of approximately 295,000,000 people. If the birth rate was 13 births for every 1,000 people, approximately how many births occurred in the United States in 2005?