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प्रश्न
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
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उत्तर
(c) pollination, fertilisation, embryo, seed
The pollens are transferred to the stigma by pollination, the gametes then fuse and under go fertilisation to form the zygote which develops into an embryo and, then, into a seed.
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संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
(i) Name the part marked 'A' in the diagram.
(ii) How dose 'A' reachese part 'B'?
(iii) State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?
Name the parts A, B and C shown in the following diagram and state one function of each.
"The chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
A flower may have either male or female reproductive parts. Such a flower is called ______.
How does the process of fertilisation take place in flowers?
The process of fusion of the male and female gametes is called ______.
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
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.
In the figure, the parts marked A, B and C are sequentially:
(A) Plumule, Radicle and Cotyledon
(B) Radicle, Plumule and Cotyledon
(C) Plumule, Cotyledon and Radicle
(D) Radicle, Cotyledon and Plumule
Pollen grains from anther are transferred to the stigma.
Give scientific reason.
Fertilization in plants is called double fertilization.
In which part of the flower germination of pollen grains takes place?
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
In a flowering plant, archesporium gives rise to ______.
In human beings, fertilization occurs in the ______
What is the function of calyx?
The number of pollen sacs in a dithecous anther is ______.
