What is the term for a drug that binds to a receptor with high affinity but a lower efficacy than the endogenous neurotransmitter?

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

What are charcteristics of lithosphere?