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प्रश्न
Mention pollination types.
Explain the different types of pollination.
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उत्तर
- Self-pollination: It is the transfer of pollen grains from the anther to the stigma of the same flower or another flower on the same plant.
- Cross-pollination: It is the transfer of pollen grains from the anther to the stigma of the flower present on two different plants.
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संबंधित प्रश्न
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
Explain what you understand by sexual reproduction.
The reproductive part of a plant is the ______.
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
What is made in anther of a flower?
Explain the terms 'cross-pollination'?
Give some examples of different modes of fertilisation in nature?
What is seed?
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(a) pollination, fertilisation, seed, embryo
(b) seed, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seed
(d) embryo, seed, pollination, fertilisation
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
Fill in the blanks:
A stamen consists of ______ and ________.
Mention the function of Flower.
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
Pollen grains are formed by _________ division in locules of anthers.
Find an odd one out.
Calyx : Sepals : : Corolla : ________________
Bisexual : Hibiscus : : Unisexual : ___________
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
Distinguish between self-pollination and cross-pollination.
The essential parts of a flower are ______.
In which part of the flower germination of pollen grains takes place?
The ovule of an angiosperm is technically equivalent to ______
Identify the female gametophyte in angiosperms.
Flowers showing ornithophily show few characteristic like ______.
The process of release of eggs from the ovary is called ______
In human beings, fertilization occurs in the ______
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
What are the agents for pollination?
Name the reproductive parts of an angiosperm. Where are these parts located? Explain the structure of its male reproductive part.
State the post-fertilisation changes that lead to fruit formation in plants.
