Which abiotic factor is not essential for early growth of the plant but growth is sustained only in its presence.
A.oxygen
b.light
C.nutrients
d.light
Explain it
Answers
Oxygen is not essential for the early growth of plants but growth is sustained due to the presence of the nutrients.
If oxygen is not there then how can a plant get the carbon dioxide and produce more and more oxygen.
The carbon dioxide is needed to grow the plants.
It helps a lot to grow more.
Answer:
The correct option is light.
Explanation:
The essential elements for plant growth are water, oxygen, and nutrients. The plant cells grow in size as a result of cell enlargement which in turn requires water. Cell turgidity promotes cell growth. As a result, plant growth and development are intrinsically linked to the plant's water state. Water also provides the medium for enzymatic activities needed for growth. Oxygen helps in the release of metabolic energy which is essential for growth activities. Both macro and micronutrients are required by plants for the synthesis of protoplasm and act as a source of energy.
In addition to these elements, there is an optimum temperature range that is best suited for plant growth. Any deviation from this optimum range could be detrimental to its survival. However certain phases/stages of growth are also affected by light. Therefore light is not essential for the early growth of the plant but growth is sustained only in its presence.
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