Why are tropical waters so blue?

a. Higher density of water
b. Large bacteria populations
c. High mineral content
d. Low primary productivity


d

Biology & Microbiology

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The most ancient type of organisms on Earth originated:

A. 4,004 years ago B. 7,200 years ago C. 2 million years ago D. 3.5 billion years ago E. 13 billion years ago

Biology & Microbiology

T cells are produced in the bone marrow but mature in the thyroid

a. True b. False

Biology & Microbiology

Is it true or false that the generally-recognized-as-safe rule means that the FDA sees a foreseeable threat from human use of the product?

A) True B) False

Biology & Microbiology

Refer to the accompanying figure. Which label indicates the location of the promoter region?


a. A
b. B
c. C
d. D
e. E

Biology & Microbiology