Sapna's younger brother saw a banana tree in backyard of a house. He could see the fruits but .no seeds.
He wanted to know how a new plant will be produced without seed and asked Sapna (a class XII biology student) about it. She explained that some plants can grow without seeds and the phenomenon is called vegetative propagation. Her brother was amazed to know the new concept about plants.
(i) How does banana produce a new plant? Is this reproduction, sexual or asexual?
(ii) Give examples of some other fruits and vegetables that can reproduce by this method.
(iii) Identify the values shown by Sapna's brother.

On a biological excursion, Abhishek asked his teacher that in nature, we find that some organisms live for few weeks to few months, whereas some live for many years.
(i) What is the term used for the certain period of time an organism lives?
(ii) Is there any correlation between the time period for which an organism lives and their size?
(iii) Why a rice plant lives for 3-4 months, while a banyan tree lives for 200 years? (iv) Identify the values shown by Abhishek.

Last year, Dadaji was going to meet his old friend in a village near Lucknow. Dadaji's friend was earnings a lot by exporting mangoes. Anil also accompanied Dadaji as he also very found of mangoes. Dadaji's friend invited him to visit the orchard. Anil knew that there are many varieties of mangoes with different shapes, color of skin and tastes. On visiting the orchard, Anil was surprised to see that more than one type of mangoes were growing on the same tree.
(i) Is it possible for Anil to grow for commercial purpose any variety of mango on the tree of mango growing in his garden?
(ii) What type of reproduction is involved in this process?
(iii) Name any other species which can be propagated by this technique for commercial purpose.
(iv) How could Dadaji's friend improve the varieties of mangoes in his garden?

Rachna's father went to Kolkata where he was gifted a pot with new variety of rose. The flowers were very beautiful. On birthday of Rachna's father to bring for her the same variety of rose on his next visit to Kolkata. He smiled and advised her to raise it herself from the plants growing in his home.
Read the above passage and answer the following question:
(i)   How can father's advice help Neena to raise new seedling of rose variety present in Ranchna's home?
(ii)  Which method of reproduction is involved in this process?
(iii) Can this technique be used for commercial propagation of other ornamental plants?

One day, Ramesh was standing in the kitchen with his mother who was cutting onions for making vegetable. He observed that in some of the onion bulbs, green leaves appeared on the upper end and roots on the lower end. In the evening, he shared his observation with his father, a Botany teacher. His father explained that in case of onion. new plants develop through sexual reproduction.
Read the above passage and answer the following question:
(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 vegetable which are propagated by using bulbs?
(iv) What value is displayed by Ramesh's father?