I think its option b, may carry out nitrogen fixation.
Harmful because they change how the genes are supposed to form and they can give disorders at times.
The warm water sinks and travels to areas where the water is cold then rises again. The cycle repeats.
Answer:
the scientist obtain that plants perform photosynthesis process in the presence of sunlight and chlorophyll.
Explanation:
they perform photosynthesis process taking water and carbon dioxide in the presence of sunlight and chlorophyll and produce glucose and liberate oxygen gas. Hence sugars are obtained from this process.