Question

i. Which type of Tropic Movement is shown by the shoot tip and roots in the given figure.
ii. Name the hormone responsible for this
iii. Wilting of leaves in the plant is caused by which hormone?

Answer 1

Answer:

1. Shoot tip - Positive phototropism

  Roots     - Negative phototropism

2. Hormone is auxin

3. Wilting of leaves is caused by abscisic acid(ABA).

Explanation:

Answer 2

Tropic movement for shoot : Positive phototropism

for Root : Negative phototropism

Hormone responsible : Auxin

Wilting of leaves in the plant is caused by Abscisic acid (ABA)

Explanation:

• Phototropism is the capability of a plant, or other photosynthesizing creature, to nurture directionally in retort to a light source. Phototrophic Stimulus Response. Plants and other autotrophs need to produce their own nutrition; they generally do this over photosynthesis.
• The main function of auxin is to help plants grow. Auxin stimulates plant cells to elongate, and the apical meristem of a plant is one of the main places that auxin is produced.
• Abscisic acid (ABA) is often referred to as a inhibitory rather than stimulatory hormone. It is involved in the closure of stomata, bud and seed dormancy and is known to inhibit other hormonal actions.

Learn more about hormone

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