why is it important that a cell membrane contains opening into the cell a the opening allows chemical such as oxygen and other nutrients into the cell b the opening will allow the cell to grow larger see the openings are only used for carbon dioxide to leave the inside of the cell the opening in the cell membrane allows DNA to come in and out of the cell ​

Explanation:

Cells generate energy from the controlled breakdown of food molecules. ... View Terms of Use  molecules that other cells rely on for the energy required to sustain growth, metabolism, ... proteins that span the cell membrane permit specific molecules into the cell, Figure 2: Cells can incorporate nutrients by phagocytosis.

answer; polycythemia is the correct answer;

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: