Isn't it the cell membrane? The cell membrane controls what goes in and out of the cell using active and passive transport. Osmosis being a part of passive transport.
The coronary artery supplies blood to the heart. if there are blockages, you will have a heart attack, since this artery supplies oxygen rich blood to the heart. Without it, the heart can die
Active transport requires ATP molecules and can happen only in living cells
Answer:
In primary succession, newly formed rock is colonized by living things for the first time.
Explanation:
In secondary succession an area that was previously occupied by living things is Disturbed then recolonized following the disturbance
I have just taken the test, and the answer is in fact B.
