B explained is that idek I just need points
Palmitic acid is considered a saturated fatty acid since it has no double bond in its structure and is solid at room temperature. It is a long-chain fatty acid with 16-Carbon backbone. It is typically found in fats and waxes such as olive oil and palm oil.
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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.
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brainliest answer if correct
Explanation:
plants
proteins
