Cell membranes are important because they protect the cell and control the materials that flow in and out of it. Lipids are needed in order to create the membranes in the cell.
Answer:
They contain symbiotic rhizobia bacteria within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants; this helps to fertilize the soil
Infections are the tiniest and least complex life form known. They are 10 to 100 times littler than microbes (or bacteria).
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Nitrate pollution in groundwater is most dangerous to infants, because it may cause blue baby <span> syndrome.</span>
The 3rd answer is correct.
