Cells can make certain molecules when needed for a certain function. What happens when those molecules are no longer needed

The last choice.

Explanation:

The molecules would be stored for later use. The cells won't just throw out as molecule they could use later, they will n. it until they need it again.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?