<span>This averages about 75 percent. This type of cocaine is a free base cocaine and is smoked. The high that it gives to the smokers is short but intense. It is also known as the most addictive form of cocaine.</span>
The answer is diffusion.
Facilitated diffusion is a process by which molecules are transported across the plasma membrane with the help of membrane proteins.
Answer:
The invention of the electron microscope allowed them to see organelles and other structures smaller than cells. There is variation in cells, but all cells have a plasma membrane, cytoplasm, ribosomes, and DNA. These similarities show that all life on Earth has a common ancestor in the distant past
