The organisms that obtain energy by oxidation of hydrogen sulfide and use carbon dioxide as a carbon source are called

A. heterotrophs.
B. chemoheterotrophs.
C. autotrophs.
D. chemolithoautotrophs.


D. chemolithoautotrophs.

Biology & Microbiology

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Abscisic acid binding causes a plant cell to release a gas called nitric oxide (NO), which increases ____ levels within the cell

a. nitrogen b. calcium c. chlorine d. potassium e. sodium

Biology & Microbiology

Which of the following would you expect to have the least similar embryological development to that of humans?

A) whales B) parrots C) fish D) salamanders

Biology & Microbiology

Refer to the accompanying figure. The structure labeled with the number ____ is responsible for the transport of

dissolved sugars. a. 4 b. 5 c. 6 d. 7 e. 9

Biology & Microbiology

Which of the following is an example of a female mating with a male only after submitting him to a courtship ritual?

a. A female frigate bird is attracted to the male with the brightest red chest feathers. b. A female black widow will only mate with a male that will mate guard her. c. A female arctic squirrel will mate with the male that controls the best territory. d. A female moth will mate with the same male for 24 hours. e. A female bowerbird will mate with a male only after inspecting the small thatched structure he has built for her.

Biology & Microbiology