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प्रश्न
Explain the term 'fertilisation'.
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उत्तर
Fertilisation is the fusion or union of male and female gametes to form a zygote.
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संबंधित प्रश्न
State significance of pollination.
You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open a soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is :
(A) III, I, V, IV, II
(B) III, I, II, IV, V
(C) III, IV, V, I, II
(D) III, I, IV, V, II
The anther contains ______.
Explain what you understand by sexual reproduction.
Name the swollen lower part of the carpel.
Fill in the following blank with suitable word :
The ovary of a flower becomes ....... after fertilisation.
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
In the figure given alongside, the parts marked A, B and C are sequentially :
(a) cotyledon, plumule and radicle
(b) plumule, radicle and cotyledon
(c) plumule, cotyledon and radicle
(d) radicle, cotyledon and plumule
In what ways is fertilisation in a plant similar to fertilisation in a human?
(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.
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
Sketch the labeled diagram:
Flower with its sexual reproductive organs
Find an odd one out.
Define.
Inflorescence
Draw a neat and labelled diagram.
Double fertilization in angiosperms
Which of the following is the outermost protective layer of anther?
Identify the female gametophyte in angiosperms.
Give any two examples of agents of pollination.
In a plant flower the female whorl is ______.
Triple fusion involves ______.
