pH is

(a) a measure of phosphorous concentration.
(b) a measure of hydrogen ion concentration.
(c) measured by counting the number of different kinds of aquatic insects.
(d) measured on a scale from 1 to 100.


(a) a measure of phosphorous concentration.

Biology & Microbiology

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Which of the following is a characteristic of Nanos protein?

A. Throughout the first seven nuclear divisions, Nanos concentration is higher in the anterior pole than in the posterior pole. B. Nanos represses Hunchback in the posterior pole. C. Nanos is a transcriptional activator of many segmentation genes. D. Nanos represses Caudal in the anterior pole.

Biology & Microbiology

Most carbon dioxide is transported in red blood cells bound to hemoglobin

Indicate whether the statement is true or false

Biology & Microbiology

What is the correct order for the application of Koch's postulates? I.Inoculate suspect agent into test subject and observe that subject develops disease of interest.II.Isolate and culture suspect agent in the laboratory.III.Find suspect agent is every case of disease of interest but not in healthy hosts.IV.Recover and isolate suspect agent from test subject.

A. III, I, IV, II B. IV, I, III, II C. I, II, III, IV D. III, II, I, IV E. IV, I, II, III

Biology & Microbiology

A(n) (acidic/metallic/fluorescent) molecule is one that absorbs invisible radiation and emits visible light.

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

Biology & Microbiology