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KengaRu [80]
3 years ago
13

Why was the evolution of cyanobacteria such a significant event in Earth's history?

Biology
1 answer:
Black_prince [1.1K]3 years ago
4 0
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Mutation

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2 years ago
Select the correct answer.
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The answer is C.

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What happens when the parasympathetic nervous system is activated
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Body functions stimulated by the parasympathetic nervous system (PSNS) include sexual arousal, salivation, lacrimation, urination, digestion, and defecation. The PSNS primarily uses acetylcholine as its neurotransmitter. Peptides (such as cholecystokinin) may also act on the PSNS as neurotransmitters. The parasympathetic nervous system is composed mainly of the cranial and sacral spinal nerves.

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6 0
3 years ago
The _____ produces secondary phloem and xylem tissue, adding to a tree's girth.
lilavasa [31]
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Kepler correctly proposed that the planets orbited the sun in _____ orbits.
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Eliptical (oval shaped), rather than Circular.
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