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:
people immigrate to find better places
Explanation:
people immigrate because when they don't have the right opportunities where they live they have to move and find more
create agencies with the authority to protect those rights
Answer: tart by giving more than what is expected. Whether it is helping a colleague work on a project, organizing a neighborhood clean-up, or shoveling snow at an elderly neighbor's house, learn to become aware of what is happening around you and what others are experiencing. This helps you to live more fully in the present.
Explanation: you are welcome
