I think the correct answer is cell wall. A tough and flexible layer that surrounds plant cells, as well as some algal and bacterial cells is called the cell wall. It protects the organism from harmful environment. Hope this answers the question. Have a nice day.
Answer:
a
Explanation:
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A maximum civil penalty of up to $40,000.
Answer is D. Nitrogen fixation.
The root nodules of some plants contains Rhizobium bacteria which fixes atmospheric nitrogen into soil as Ammonia. Ammonia is converted into nitrate which is the most usable form of nitrogen in the soil. Nitrate is absorbed by the roots of the plants, from plants nitrogen reaches to animals when they eat plants.