Organic molecules consisting of only hydrogen and carbon are called:

A) carbohydrates.
B) hydroxyls.
C) hydrocarbons.
D) fats.
E) carbonic hydrides


C) hydrocarbons.

Biology & Microbiology

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How many levels of consumption are depicted

in the figure? a. 1 b. 2 c. 3 d. 4 e. 5

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The yolk sac is indicated by

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

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Which organisms are called extremophiles and flourish mostly in extreme conditions?

A) Protozoans B) Archaea C) Bacteria D) Fungi

Biology & Microbiology

Which category includes most of the bacteria that cause human disease?

a. photoautotrophs b. photoheterotrophs c. chemoautotrophs d. chemoheterotrophs

Biology & Microbiology