Cell wall: it controls the movement of substances that come in and out of the cell
cell membrane: it strengthens the cell
similarities: both of the parts are around the circumference of the cell
Explanation:
anaerobic respiration would be used when the body has inefficient of 
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<span>simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history</span>
Sweat, mucus, tears, and saliva all contain enzymes that kill pathogens.
Answer:
To be honest the Atmosphere is 72 percent nitrogen and 25 percent oxygen and
