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प्रश्न
Distinguish between self-pollination and cross-pollination.
उत्तर
In self-pollination, only one or two flowers borne on the same plant are involved, whereas in cross-pollination two flowers borne on two plants of same species are involved.
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संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
Name the parts labelled as A, B, C and D in the diagram given below:-
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.
Give one example of a unisexual flower.
How is the process of pollination different from fertilization?
Sketch the reproductive parts of a flower.
The process of fusion of the male and female gametes is called ______.
Name the part made up of the stigma, style and ovary.
Name the swollen lower part of the carpel.
Name the male part of the flower.
Where are the pollen grains produced?
What are the reproductive organs in a flower?
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
The ovule becomes a .......... after fertilisation.
How is the process of pollination different from fertilization?
What type of plants reproduce by sexual reproduction method?
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Fill in the blank:
Seeds are formed from________.
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
State whether the following statement is true (T) or false (F):
Flowers which possess stamens and carpel are called unisexual.
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.
Write the names of male and female reproductive parts of a flower.
What is phototropism?
Describe an activity to demonstrate phototropism.
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
Calyx : Sepals : : Corolla : ________________
What does germination mean?
Observe the figure below. Write functions of the labelled parts.
The ovule of an angiosperm is technically equivalent to ______
Generally, in a pollen tube, which of the following moves to the tip of the tube?
Identify the female gametophyte in angiosperms.
The seed that contains the future plant is called the ______
Which out of the following processes does not lead to the formation of clones.
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Type of sexual reproduction is ______.
