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erma4kov [3.2K]
3 years ago
8

What helps maintain global oxygen concentrations in the troposphere?

Biology
1 answer:
olya-2409 [2.1K]3 years ago
6 0
It was plants maintained photothenysis . global oxygen increase very important.but natural do it
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Describe the functions of the four photoreceptor proteins in human vision.
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Answer:

In human vision, the cone visual opsins are grouped into four photoreceptor protein families LWS, SWS1, SWS2, RH2 .

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