Which characteristic is seen in whales, but not in phytoplankton (cell wall, heterotrophic, unicellular, or prokaryotic? )

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

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.