Dissolved oxygen content in stream water is affected by

a. organic matter in the water.
b. overgrowth of algae.
c. water nutrient levels.
d. all of the above.


d

Biology & Microbiology

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Transmembrane movement of a substance against a concentration gradient is called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The study of how large-scale ecological factors influence local populations and communities is

specifically defined as conservation biology.

Indicate whether the statement is true or false.

Biology & Microbiology

Approximately what percentage of the human genome consists of noncoding DNA?

A) 98% B) 87% C) 77% D) 67%

Biology & Microbiology

Gel electrophoresis separates DNA fragments according to their:

A. percentage of labeled nucleotides B. base sequence C. number of attached primers D. size

Biology & Microbiology