When a signaling molecule binds to the GPCR, the G protein alpha subunit exchanges GDP for GTP. The alpha subunit dissociates from the beta and gamma subunits and interacts with other molecules, ultimately triggering a cellular response. ... GTP is hydrolyzed to GDP, and the signaling molecule comes off of the receptor.
Well it's impossible for different population to have the same name.
So I would say this for the answer.
One population can have the same name.
I would say C) is warmer than the north and south poles
Establish a hyperosmotic interstitial medullary concentration