I believe it is d. deactivating an enzyme
Answer:
The Puffins would have to find more food sources and the beaks would change accordingly to the food source they are going after.
the answer is vascular bundle
I THINK ur most probable answer would be A
A - They are all or none in amplitude.
This is the answer as answer choices b, c, d, and e are all characteristics of synaptic potentials.
Hope this helps!