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Answer:
Chitin is a long-chain polymer derived from glucose. It strengthens cell walls of fungi and the outer covering (exoskeleton) of arthropods (including crabs, shrimps, and insects).
Explanation:
Answer:
It's secreted into the extracellular fluids. Collects in the lymph fluid, the vascular blood fluid and eventually the excess is secreted via, urine, feces, lung respiratory exhalation gases, sweat, nasal and mouth, throat mucous and saliva, tears, etc.
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Answer:
All plants remain rigid because of cell walls.
Explanation:
