Because plants lack the ability to directly use the present in the atmosphere, their abundance often depends on bacterial populations present within the soil.

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4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Explain why phospholipid molecules form a bilayer. (3 marks)