Question

One day, Ramesh was standing in the kitchen with his mother who was cutting onions for making vegetables. He observed that in some of onion bulbs, green leaves appeared on upper end & roots on the lower end. In the evening, he shared his observations and discussed with his father, a Botany teacher. His father explained that in case of onion, new plants develop through asexual reproduction. Read the above passage and answer the following questions:- i) What is the name of this type of Propagation? ii) Can this method be used for raising onion plants at home also? iii) Name some other vegetables which are propagated by using bulbs. iv) What value is displayed by Ramesh’s father?

Answer 1

Answer:

Explanation:

1. The name of this propagation is called budding.

2. Yes, this method can be used for rasing onion plants at home.

3. Potatoes also show same type of propagation using bulbs.

4. His father is Avery kind and helpful teacher.

Answer 2

Answer:

(i) The name of this propagation is bulb propagation.

(ii) Yes, this method can be used to raise onions at home also.

(iii) Examples are crinum lilies, garlic, shallot, leek, etc.

(iv) Ramesh's father has a good knowledge of Botany and he is successfully imparting it to his son.

Explanation:

• Although the most popular means of reproduction are seeds, this is not the same as vegetative proliferation. This is due to the fact that fertilization, which is a component of asexual reproduction, is required for seed development. The onion does not reproduce sexually.
• An example of an underground stem alteration seen in onions is the bulb. It is underground and fashioned like a pear. The terminal bulb and a stem with a disc form are encased in many soft scales. The adventitious roots grow from the bulb's base. Its primary use is the storage of food and perennials, making it non-green.
• Since the genetic makeup is preserved, vegetative propagation has several advantages, but this is also one of its disadvantages. It hinders new varieties and superior offspring by not allowing genetic variety in species. Similar genetic make-up may result in low yield, which is bad for the health of the crop and the economy.

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