Advertisements
Advertisements
प्रश्न
State the number of sets of chromosomes present in a zygote.
Advertisements
उत्तर
Zygote has 2 sets of chromosomes alternatively accept 2n.
APPEARS IN
संबंधित प्रश्न
Explain what you understand by sexual reproduction.
Give some examples of different modes of fertilisation in nature?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
Which of the following statements are true for flowers?
(i) Flowers are always bisexual.
(ii) They contain sexual reproductive organs.
(iii) They are produced in all groups of plants.
(iv) after fertilization they give rise to fruits.
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
The students of a class were asked by the teacher to study the different parts of an embryo of an angiosperm. Given below are the essential steps for the experiment :
A. Soak the seeds in plain water and keep them overnight.
B. Cut open the soaked seed and observe its different parts.
C. Take some healthy seeds in a petri-dish.
D. Drain the excess water, cover the seeds with a wet cotton cloth and leave them as it is for a day.
The correct sequence of these steps is
(a) C, A, D, B
(b) C, D, A, B
(c) A, C, D, B
(d) A, C, B, D
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
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
Double fertilization means ______.
