Mainly there is cell wall at the outer of prokaryotes ! but not have cell wall as PPLO or mycoplasma don't have cell wall !
Explanation:
The definition of watershed is
"any point on uphill from where water flows downstream wither in the form of river, stream or rain water".
From the definition we can say that watershed (either natural or man made) would me anything that is present in that area where the water flows downstream to houses, parks, and dams.
I have attached picture for better understating.
Because of the relative longevity and reproductive capacity of predators vs.<span>plankton</span>
Answer:
I think its Photosystem 2