Answer:
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. ... Plant cell walls are primarily made of cellulose, which is the most abundant macromolecule on Earth. Cellulose fibers are long, linear polymers of hundreds of glucose molecules.
Explanation: brainliest
Answer:
Mechanical barriers — which include the skin , mucous membranes , and fluids such as tears and urine — physically block pathogens from entering the body. Chemical barriers — such as enzymes in sweat , saliva , and semen — kill pathogens on body surfaces.
<span>Foreshadowing means B. hinting at things that will occur later. Sometimes authors may introduce a symbol or a character so as to show the readers that something awaits them in the following chapters, but he or she will not reveal immediately what that actually is. The other examples don't really make any sense and do not refer to what foreshadowing actually is.</span>
