Aneuron releases neurotransmitter in a synapse that binds with receptors in the postsynaptic cell. the receptors cause potassium channels to open. what will result

answer; an inhibitory postsynaptic potential;

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.