1. Tardigrade
  2. Question
  3. Biology
  4. (I). O2 helps in releasing metabolic energy essential for growth activities. (II). Nutrients (Micro and Macromolecules) are required by plants for the synthesis of protoplasm as well as act as source of energy (III). Optimum temperature for plant growth is needed (IV). Environmental signal like light and gravity affect certain phases of growth

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Q. (I). $O_2$ helps in releasing metabolic energy essential for growth activities.
(II). Nutrients (Micro and Macromolecules) are required by plants for the synthesis of protoplasm as well as act as source of energy
(III). Optimum temperature for plant growth is needed
(IV). Environmental signal like light and gravity affect certain phases of growth

Plant Growth and Development

Solution:

Correct answer is (a) All are correct