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प्रश्न
(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.
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उत्तर
(a) A - Stigma, Function - The stigma is a sticky surface where the pollen lands and later germinates
B - Pollen tube, Function- It carries the pollen to the egg cell for fertilization
C - Egg cell, Function- It fuses with the male gamete and leads to the formation of zygote.
(b) Role of gametes- The gametes play an important role in the sexually reproducing organisms as they carry the entire genetic information of the organism. These gametes upon fusion result in the formation of zygote, which develops into a new individual. Any deformation in the gametes will lead to the deformity in the newly formed offspring.
Role of zygote- Zygote is the diploid cell formed by the fusion of male and female gametes during fertilization in sexual reproduction. Zygote is the first stage in the development process of an organism and it contains all the genetic information of both the parents, essential for the growth of the new organism.
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संबंधित प्रश्न
How is the process of pollination different from fertilization?
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
What is phototropism?
Describe an activity to demonstrate phototropism.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
Accessory whorls : Calyx and corolla : : essential whorls : ______________
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
