Answer:
Answer is D - cAMP.
Explanation:
cAMP is a small molecule that functions as an intracellular signaling molecule - a second messenger. The first messenger would be the thing that activated the GPCR (e.g. a hormone). The GPCR is a signal transducer (converts extracellular signal to intracellular signal). Once activated, the GPCR activates adenylate cyclase which can be called a signal effector - it is an enzyme that produces cAMP.
Answer:
grass
Explanation:
grass produces the main source of energy for the food chain
Answer:
be happy
Explanation:
get enough rest and eat good
Wait and be patience for the medication, it could take some more time in certain cases
