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Questions
What is pollination?
What is meant by pollination?
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Solution
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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RELATED QUESTIONS
Name the parts labelled as A, B, C and D in the diagram given below:-
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
Give one example of a unisexual flower.
Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
(ii) sperm,
(iii) ovary,
(iv) egg
How is the process of pollination different from fertilization?
Mature ovary forms the ______.
Name the male part of the flower.
Fill in the following blank with suitable word :
The ovary of a flower becomes ....... after fertilisation.
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
What is pollination? How does pollination occur?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
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.
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :
(a) vas deferens
(b) anther
(c) ovary
(d) style
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
When an insect sits on the flower of a plant then some particles A present in the top of little stalks in the flower attach to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of flower. The particle A grows a long tube b from the top of flask-shaped organ through which C moves down and reaches the bottom part of flask-shaped organ. Here C fuses with the nucleus of d contained in structure E. the fusion of C and D forms a new cell f which grows and develops into a seed of the plant.
(a) What are particles A? What is the process of transferring A from one flower to another flower of similar plant by the insect known as?
(b) What is the name of tube B?
(c) What is C which moves down through the tube B?
(d) Name D and E.
(e) What is F?
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
State whether the following statement is true (T) or false (F):
Flowers which possess stamens and carpel are called unisexual.
What part is played by stamens and carpels in reproduction?
You have to perform the experiment, "To identify the different parts of an embryo of a gram seed." Describe the procedure that you would follow.
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Write the names of male and female reproductive parts of a flower.
List any two differences between pollination and fertilization.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
__________ is present in unisexual flower.
Define.
Inflorescence
The essential parts of a flower are ______.
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.
Where does the endothecium layer of anther lobes is present?
The anther wall consists of four wall layers where ______
Generally, in a pollen tube, which of the following moves to the tip of the tube?
Which type of development is observed in male gametophytes of plants?
Length of pollen tube depends on the distance between ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
Double fertilization is exhibited by ______
Double fertilization means ______.
Sketch and label the essential and accessory whorls of flower.
What are the agents for pollination?
What is the function of calyx?
Triple fusion involves ______.
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
What is puberty?
In flowering plants, the pollen grains are transferred to stigma by pollination but the female germ cells are present in the ovary.
Explain with the help of a labelled diagram (only concerned parts), how the male germ cell reaches the ovary.
Type of sexual reproduction is ______.
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.
