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प्रश्न
Prepare a slogan for campaign against female foeticide.
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उत्तर
Avoid female foeticide, save girl child
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संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
Name the parts labelled as A, B, C and D in the diagram given below:-
(i) Name the part marked 'A' in the diagram.
(ii) How dose 'A' reachese part 'B'?
(iii) State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?
Name and differentiate between the two modes of pollination in flowering plants.
Sketch the reproductive parts of a flower.
Where are the pollen grains produced?
What are the reproductive organs in a flower?
What is the name of female part of a flower?
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
Explain the terms 'cross-pollination'?
Explain the term 'fertilisation'.
Name the part of a seed which contains stored food.
Name the part of a seed which grows into shoot.
Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross pollination
(iv) Unisexual flower possessing only stamens cannot produce fruits
(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (i), (iii) and (iv)
| When an insect sits on the flower of a plant then somene 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. |
- 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?
- What is the name of tube B?
- What is C which moves down through the tube B?
- Name D and E.
- What is F?
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
What are the male and female gametes in a flowering plant?
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.
Explain the process of fertilisation in flowers.
“Cell division is a type of reproduction in unicellular organism.” Justify.
Mention pollination types.
Answer the following question.
How does suitable pollination lead to fertilization?
Differentiate between self-pollination and cross-pollination.
Bisexual : Hibiscus : : Unisexual : ___________
What does germination mean?
Write the functions of sepals
How many middle layers are generally present in the wall of the anther lobes?
Which type of development is observed in male gametophytes of plants?
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
The process of release of eggs from the ovary is called ______
Which out of the following processes does not lead to the formation of clones.
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
What is the structural unit of sexual reproduction in plant?
What are the agents for pollination?
The pollen tube usually enters the embryo sac ______.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
