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प्रश्न
What is pollination?
What is meant by pollination?
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उत्तर
Pollination is the transfer of pollen grains from the male part of a flower, the anther, to the female part, the stigma. This process is crucial for fertilization, leading to the development of seeds and fruits and ensuring the plant species survival.
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संबंधित प्रश्न
A student identified the various parts of an embryo of a gram seed and listed them as given below :
(I) Testa
(II) Plumule
(III) Radicle
(IV) Cotyledon
(V) Tegmen
Out of these the actual parts of the embryo are :
(A) I, II, III
(B) II, III, IV
(C) III, IV, V
(D) II, IV, V
Name the parts labelled as A, B, C and D in the diagram given below:
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
State the function of flowers in the flowering plants.
How does the process of fertilisation take place in flowers?
The process of fusion of the male and female gametes is called ______.
State the name of the functional unit concerned with sexual reproduction.
Name the male part of the flower.
Fill in the following blank with suitable word :
The female organ of reproduction in the flower is the...........
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
What is made in anther of a flower?
What is made in ovary of a flower?
Explain the term 'fertilisation'.
Give some examples of different modes of fertilisation in nature?
What type of plants reproduce by sexual reproduction method?
Name the part of a seed which grows into root.
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
In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Explain.
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
Fill in the blanks:
A stamen consists of ______ and ________.
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
(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
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Bisexual : Hibiscus : : Unisexual : ___________
Accessory whorls : Calyx and corolla : : essential whorls : ______________
Pollen grains from anther are transferred to the stigma.
Define.
Inflorescence
Write the functions of sepals
Explain the sexual reproduction process in plants with a diagram.
Identify the parts A, B, C, and D?
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
Write the events involved in the sexual reproduction of a flowering plant.
a. Discuss the first event and write the types.
b. Mention the advantages and the disadvantages of that event.
Where does the endothecium layer of anther lobes is present?
Which of the following is the outermost protective layer of anther?
How many middle layers are generally present in the wall of the anther lobes?
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
In human beings, fertilization occurs in the ______
Pollen grains are produced by ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
The ovaries of different flowers may contain ______.
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
Double fertilization is exhibited by ______
Sketch and label the essential and accessory whorls of flower.
In a plant flower the female whorl is ______.
Triple fusion involves ______.
The pollen tube usually enters the embryo sac ______.
Given below is a diagram of a germinating seed. Label the parts that:
- gives rise to future shoot.
- gives rise to future root system.
- stores food.
