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Explanation:
The ultimate souce of energy for the food chain is solar energy from the sun. It allows plants to convert the solar energy to chemical energy for growth. The growing plants in turn allow heterotropic animals to consume them to obtain energy of their own.
Lipids form the bilayer of cell membrane which act as a partially permeable mmbrane of cell to control the substances moving in and out of the cell.
It's called muscle spasticity. Or in common terms, muscle cramp.
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