I believe it’s the second one
Drastic change in pH or temperature because the enzyme reaction may become denatured.
Answer:
d. ligand-gated ion channel
Explanation:
When a neurotransmitter released from the pre-synaptic neuron binds to a ligand-gated ion channel on the post-synaptic neuron, that neuron depolarizes and fires.
C. Socially-constructed groups.
A terrestrial ecosystem is a land-based community of organisms.
