An organism that grows specifically on nonliving organic material is called

(a) an autotroph.
(b) a heterotroph.
(c) a parasite.
(d) a saprophyte.


(d) a saprophyte.

Biology & Microbiology

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The activity of adenyl cyclase is influenced by

A. the presence of lactose in the environment. B. the phosphotransferase system. C. homoserine lactones. D. None of the choices are correct.

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One of the advantages seeds have over spores is that they can delay germination until conditions are favorable for growth

A. true B. false

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For plants, mycorrhizae are______

A) parasitic B) mutualistic C) an adaptation for photosynthesis D) agricultural pests

Biology & Microbiology

What is the blind spot, and why does it occur?

What will be an ideal response?

Biology & Microbiology