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Question
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
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Solution
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RELATED QUESTIONS
A flower of tomato plant following the process of sexual reproduction produces 200 viable seeds.
Answer the following questions giving reasons :
(a) What would have been the minimum number of ovules present in pre-pollinated pistil ?
(b) How many microscope mother cells would minimally be required to produce requisite number of pollen grains ?
(c) How many pollen grains must have minimally pollinated the carple ?
(d) How many male gametes would have used to produce these 200 viable seeds ?
(e) How many megaspore mother cells were required in this process ?
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
Select and write the most appropriate answer from the given alternatives for the following subquestion:
A versatile anther is an adaptation for _______ type of pollination.
Which one of the following is one of the characteristics of self-pollinated flowers?
Give one word/term for the following:
Pollination of flowers by insects.
Give one word/term for the following:
Pollination of flowers by birds.
Describe the advantages and disadvantages of cross-pollination to the plant.
Give four adaptations shown by flowers pollinated by wind.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
Consider the following statements depicting adaptation of flowers to carryout successful pollination.
- Stigma is long, sticky and unwettable.
- Sepals, petals or perianth (if present) have waxy coating.
- Stamens with long filament and versatile anthers.
- Tubular corolla is seen.
- Flowers are noctumal.
Which of the above statements clearly depict hydrophily?
