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.
This is just my opinion
I think the most significant component of the ideology of Manifest Destiny was the belief that it was the divine will of God. This belief allowed for justification of the extreme measures required to take American Indian lands and expand across North America.
A person who engage in intra-individual communication is the one who talks to himself/herself. Talking to herself or himself is the person who is engage in intra-individual communication. When you are trying to practice speaking in public in the mirror, you are most likely engage in intra-individual communication because you are talking to yourself.
Answer:
Yes, it has
Explanation:
The main purpose for establishing free access to schools was to guarantee equal education to all students, regardless of their financial status.
In the past, education, even in its basic form, was reserved for the rich only, for people who were able to pay the school fees. Therefore, many children of the poor grew up without the basic of skills. This situation is still existing in many parts of the world today.
Free and cost free education is a constitutional right in many countries and since introducing it the literacy rates increased and the child poverty rate decreased. This show that free education has achieved its intended goal and provided many with the necessary learning needed to get a job in the future.
