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.
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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
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
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
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.