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:
True
Explanation:
Gravity pushes on the object, giving it mass.
One of the consistent research findings in the area of facial expressions and emotion is the Universality of facial expressions.
Research is defined as creating new knowledge and/or using existing knowledge in new and creative ways to generate new concepts, methods, and insights. This may involve the synthesis and analysis of previous research to the extent that it leads to new creative results.
Research is a tool for testing one's own theories and the theories of others, exploiting this conflict to find answers and expand knowledge. The purpose of research is actually a continuous process of correcting and refining hypotheses, leading to the acceptance of certain scientific truths.
Learn more about research . here
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Answer: specific phobia
Explanation:
A specific phobia refers to an irrational fear and anxiousness that someone possesses when it comes to particular objects or situations.
This fear causes the person to avoid anything that is associated with that object such that they may get anxious even when the object is mentioned or shown to them in a picture like Alan he is anxious even at the picture of spiders.
