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प्रश्न
What are chasmogamous flowers?
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उत्तर
There are two types of flowers present in plants, namely Oxalis and Viola.
Both chasmogamous and cleistogamous flowers are present in plants. Chasmogamous flowers have exposed anthers and stigmata, similar to the flowers of other species.
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संबंधित प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
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 ?
Add a note on pollination mechanism in Salvia.
Describe the structure of its microsporangium.
Fill in the blank:
Male sex cells in plants are called _________.
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.
Name of the part of the ovary which gives rise to:
Fruit ______
Name of the parts of the ovary which give rise to:
Fruit wall ______
When maturation time of reproductive parts in a flower is different.
Give one word/term for the following:
Pollination of flowers by birds.
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
Differentiate Between Cross Pollination and Self Pollination:
What are the different adaptations shown by bird-pollinated flowers?
Explain water pollination in detail with its types.
Choose the correct statement from the following.
Wind pollination is common in ______.
Pollination occurs in ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Even in absence of pollinating agents seed-setting is assured in ______.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
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 ______.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
Pollination refers to the ______.
Autogamy can occur in a chasmogamous flower if ______.
Pollination in water lilies is carried out by ______.
Which of the following floral adapation are adapted by hydrophilous flowers?
