<span>biennial weed live's for approximately 2 years. </span><span />
Answer:
(D) a protein
Explanation:
The plasma membrane has proteins that are macromolecules responsible for the movement of large molecules in and out of the cell. If these proteins are damaged, this movement will be stopped.
In addition to acting preferentially on the transport mechanisms, organizing true tunnels that allow substances to pass into and out of the cell, these proteins function as membrane receptors, charged with receiving signals from substances that carry some message to the cell, favor the Adhesion of adjacent cells in a tissue, moreover, serve as the anchor point for the cytoskeleton.
The answer is c.
the hypothesis that cells are formed spontaneously by free cell formation was proven wrong by scientists.
Id say its true but i don't really know...
