Question

Question 1 ‘All elements that are present in a plant need not be essential to its survival’. Comment.

Class XI Biology Chapter - Mineral Nutrition Page 205

Answer 1

Hello!!

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$\Huge{\mathfrak{\red{\underline{QUESTION}}}}$

⭕ All element that are present in a plant need not be essential to its survival. comment.

$\Huge{\mathfrak{\blue{\underline{ANSWER}}}}$

✳️ Plants tend to absorb different kinds of nutrients from soil.

✳️ However, a nutrient is inessential for a plant if it is not involved in the plant’s physiology and metabolism.

✳️ For example, plants growing near radioactive sites tend to accumulate radioactive metals.

✳️ Similarly, gold and selenium get accumulated in plants growing near mining sites.

✳️ However, this does not mean that radioactive metals, gold, or selenium are essential nutrients for the survival of these plants.

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Answer 2

Answer:

No, out of 105 elements absorbed by plants only about 17 elements are essential for plant growth and survival.