The correct answer is:
A. Photosynthetic pigments absorb energy from light.

I would say the first one
Answer:
...............................................................................................................
Answer:
The correct answer is - relative refractory period.
Explanation:
The relative refractory period is a period that stimulates a secondary response if the stimuli are greater than the normal. It occurs when partial repolarization after a nerve fiber fired.
The relative refractory period is one of the two types of the refractory period which is the relative and absolute refractory period. In the absolute refractory period, it is not possible to activate another action potential in membrane.
Thus, the correct answer is - relative refractory period.
It acts as a barrier so basically hydrophillic loves water, The molecules and ions DONT let them enter, that's important. The channel protein poses like a gateway across the cell membrane to let the hydrophilic molecules and ions enter it, Hope that helped some answer my question please.