Answer : Passive transport mechanism
Explanation: Passive and Active transport mechanisms are the two types of transport mechanisms by which molecules move in and out of the cell membranes. Passive Transport mechanisms do not require energy from cells. The movement of the molecules from High to Low concentration requires no energy. E.g. Osmosis, simple and facilitated diffusion.
A. Abrasion
Reason - cause by scraps on rough surface which breaks skin on outer layer.
It becomes positive because ATP synthase allows H+ ions to pass through the membrane .
Mainly by nitrogen-fixing bacteria in the soil and oceans
False. parasites infect and feed
