Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?

Question

TextpH Sensitivity of Plants and Animals

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Juice of tamarind turns blue litmus to red. It is because of the presence of an acid called :

Explain why plants and animals are sensitive to pH changes. Give one example each from plants and animals.