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प्रश्न
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
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उत्तर
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संबंधित 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.
Can cross-pollination occur in cleistogamous flowers? Give reason for your answer.
Give the floral adaptations for anemophily.
Describe the structure of its microsporangium.
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Name of the part of the ovary which gives rise to:
Fruit ______
The question has four options. Choose the correct answer:
Pollination by insect is known as
Which of these is a condition that makes flowers invariably autogamous?
In the dioecious aquatic plant shown, identify the characteristics of the male flowers that reach the female flowers for pollination:
| Size of the flower | Colour of flower | The characteristic feature of pollen grain | |
| A | small | brightly coloured | Lightweight and non-sticky |
| B | large | colourless | large and sticky |
| C | small | white | small, covered with mucilage |
| D | large | colourless | non-sticky |
