Question

of "touch-me-not" plant?
of growth in plants?
3. Name one chemical substance of plant which promotes ripening of fruits.
5. A young green plant receives sunlight from one direction only. What will happen to its shoots and
2.
4. Define chemotropism.
roots?
6. Name the plant hormones which help/promote
(i) cell division
(ii) growth of the stem
7. Mention one example of chemotropism. .
8. Name the plant hormone that retards growth of the plant.​

Answer 1

Answer:

3.ethylene

The cause of fruit ripening is a natural form of a chemical synthesized to make PVC (polyvinyl chloride) piping and plastic bags—namely, a gaseous plant hormone called ethylene.

5.A young green plant receives sunlight from one direction only. What will happen to its shoots and roots? Answer: Shoots of that plant will move to the direction of light and roots will move to the opposite direction of light.

4.Chemotropism is defined as the growth of organisms navigated by chemical stimulus from outside of the organism. It has been observed in bacteria, plants and fungi. A chemical gradient can influence the growth of the organism in a positive or negative way.

6. The plant hormone which promote cell division are Cytokinins and for stem elongation or growth are Gibberellins.

7.Chemotropism is known as growth or movement of a complete plant or plant parts towards the chemical stimulus. For example the growth of pollen tube down to the ovule in the ovary through the stigma and style during fertilization in order to respond to the presence of sugars in the style.

8.Abscisic Acid is the plant hormone that retards growth of the plant.

Explanation:

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Answer 2

hey mate ♡

3) ethylene

4)Chemotropism:

It is defined as the growth or movement of the plant or any parts towards the chemical stimulus.

6)(i) Cytokinesis

(ii) Gibberlins

7) Growth of the pollen tube down to the ovule.

8) Abscisic acid

is the answer♥