Advertisements
Advertisements
प्रश्न
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.
Advertisements
उत्तर
As a senior biology student, to demonstrate cross-pollination in a hermaphrodite flower, first perform emasculation by removing stamens before pollen release to prevent self-pollination. Next, bag the emasculated flower to avoid contamination from unwanted pollen. Then, collect pollen from a different plant and dust it onto the stigma of the emasculated flower. Finally, re-bag and label the flower to ensure controlled cross-pollination. This procedure prevents self-fertilisation and promotes genetic variation.
APPEARS IN
संबंधित प्रश्न
What is meant by emasculation?
Describe the structure of its microsporangium.
Write two ways in which pollination may occur in plants.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Which one of the following is one of the characteristics of self-pollinated flowers?
Give four adaptations shown by flowers pollinated by wind.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Differentiate Between Cross Pollination and Self Pollination:
Describe the Advantages and Disadvantages of self-pollination to the Plant.
In some plants anther and stigma mature at the same time this condition is called ______.
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
Advantage of cleistogamy is:
Autogamy can occur in a chasmogamous flower if ______.
Choose the correct statement from the following:
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
What is ornithophily?
Complete the following table:
| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
Bird pollinated flowers are usually ______.
