Answer:
The correct answer is A. control the movement of substances in and out of the cell.
Explanation:
All cell membranes are made up of lipids and proteins. Lipids are organized in two closely adjoining sheets that form a lipid bilayer. This bilayer provides the basic structure of the membrane and acts as a permeability barrier (impermeable) for most water-soluble molecules. Cells live and grow by exchanging molecules with the surrounding environment and the plasma membrane acts as a barrier that controls the transit of molecules into and out of the cell. As the interior of the membrane (the lipid bilayer) is hydrophobic, the membrane tends to block the passage of almost all water-soluble molecules (which dissolve in water). Protein molecules, which are normally “dissolved” in the lipid bilayer, act as mediators or facilitators of almost all membrane functions, either by transporting specific molecules through it or by catalyzing membrane-associated reactions, such as synthesis of ATP.
Answer:
Voting is the form of political participation do members of the voting age population engage in less than the other.
Explanation:
Political Participation refers to list of activities through which people take part in making political decisions by expressing their opinions.
Voting Age population means when a person becomes eligible to vote when they reach the mentioned age limit, mostly it is 18 years of age to become eligible.
In democracy, voting is the most common way in which voting age population engage in. Citizens when become eligible for voting, they vote for a candidate from the list of candidates who stand for elections.
