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:
an instance of social intercourse or sociability. 2 : the tendency to associate in or form social groups.
Answer:
that is calm and respectful while still criticizing the writer's inability to understand a wider perspective.
Explanation:
n simple words, one has to remain calm and civilized in writing some formal agreement or any other such document. The writer has to keep in mind that the motive of the reply or the message is not to insult the other party but to make sure the understanding of the messages between the two parties must be established.
Thus, even if one feel dissatisfied or angry from someone while writing some formal critique he or she should not use aggressive language.
The answer is C.
Hope this helps!
