Hot sulfur-rich environments associated with terrestrial sulfur-rich springs are called

A) acid-mine drainage.
B) hydrothermal vents.
C) solfataras.
D) terrestrial volcanoes.


Answer: C

Biology & Microbiology

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Fumarate production is an oxidation reaction similar to the reactions that produce ?-ketoglutarate, and oxaloacetate, but with one key difference. What is it?

a. Fumarate production releases a water molecule. b. Carbon dioxide is released in this reaction. c. This reaction reduces FAD instead of NAD+. d. Fumarate production occurs twice per cycle.

Biology & Microbiology

Isotopes of an element are differentiated by their ____

a. atomic weight b. number of orbital shells

c. element name d. mass number e. electron profile

Biology & Microbiology

The taxonomic subdivision immediately below the level of a kingdom is a 

A. phylum. B. family. C. genus. D. order.

Biology & Microbiology

Which is the only antibody that can cross the pla¬centa to protect a fetus before its own immune system becomes active?

A. IgA B. IgE C. IgM D. I gG E. IgD

Biology & Microbiology