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
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Fill in the blank:
Male sex cells in plants are called _________.
Fill in the blanks:
The two kinds of pollination are __________ and __________.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Complete the following chart and rewrite.
| Sr.No. | Agencies | type of pollination |
| 1 | Water | .................... |
| 2 | ........................... | Entomophily |
| 3 | Bat | .................... |
| 4 | ....................... | Ornithophily |
(Or)
Explain outbreeding devices in angiospermic plants.
Name of the part of the ovary which gives rise to:
Fruit ______
Give one word/term for the following:
Pollination of flowers by birds.
Describe the advantages and disadvantages of cross-pollination to the plant.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
Describe the Advantages and Disadvantages of self-pollination to the Plant.
Very short answer type question:
What is hydrophily?
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.
Chief pollinators of agricultural crops are ______.
Heterostyly as a contrivance for cross-pollination is found in ______.
In some plants anther and stigma mature at the same time this condition is called ______.
Choose the correct statement from the following:
What is ornithophily?
Name the following:
Aquatic plants which are anemophilous.
Briefly discuss any two methods by which plants avoid self-pollination.
