Upper arm/elbows front side
It enables photosynthesis by facilitating primary growth of the plant
I think the best answer is D. It is thought that advances such as agriculture, literacy, and urbanization have not been accompanied by additional increases in brain size because the physiological cost of a bigger brain exceeds its benefit. The brain requires a lot of nutrients to function. Having a bigger brain would cost a lot rather than benefiting from it.
Answer:
MACs, or membrane attack complexes, are used in the complement system.
Explanation:
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