During the nitrogen cycle, inorganic nitrogen from the atmosphere is converted into organic compounds. what is this process called? decomposition emission fixation transpiration

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

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

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell