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.
Homologous structures suggest that comparable selected pressures can produce similar adaptations, whereas analogous structures show that similar selective pressures can cause similar adaptations (beneficial features).
Similarities and differences among biological molecules (for example, in the DNA sequence of genes) can be utilized to assess the relatedness of species.
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Answer:
Homeostasis
Explanation:
Cell membrane (plasma membrane) is known to be a semi-permeable membrane that regulates the movement of substances in and out of the cell. Similarly, it is a phospholipid bilayer that separates the outer (external) environment from the inner cellular environment. Thus, plasma membrane maintains homeostasis by regulating the movement of materials or cell contents that can pass in or out of the cell on order to main balance equilibrium.
