They are called paleontologists.
The youngest would be the ones at the top and the oldest would be at the bottom. the oldest is B and the ones around it, as they get bigger get younger. hope this helps :)
The answer is B. I hope it helps.
Answer:
G-protein subunits bind to the receptor
GTP binds to the alpha subunit replacing GDP
G-protein subunits separate from the receptor
alpha subunit separates from other two subunitsalpha subunit-GTP complex alters cell activity
Explanation:
5 2 3 4 1
