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Ainat [17]
3 years ago
15

The most common source of infectious diseases in water supplies is _______. a. algal blooms b. sewage c. surface runoff d. none

of the above
Biology
2 answers:
SSSSS [86.1K]3 years ago
7 0

b. sewage just to the test

olya-2409 [2.1K]3 years ago
3 0
None of the above...
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Answer:

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Nitrogen fixation is one-way nitrogen moves through ecosystems. Why is nitrogen fixation necessary for ecosystems?
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Of the following experimental results, which is the best evidence that photosynthesis is more efficient at certain wavelengths o
GarryVolchara [31]

Answer:

The correct answer will be option-C

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The plants absorb maximum sunlight at two wavelengths that are red and blue wavelength by chlorophyll and other pigments. The efficiency of photosynthesis is also measured maximum at these two active wavelengths called action spectrum.

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Thus, the selected option is the correct answer.

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