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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 labelled as A, B, C and D in the diagram given below:-
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below:
Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon.
On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
(a) Testa, Radicle, Cotyleddon
(b) Tegmen, Radicle, Micropyle
(c) Cotyledon, Plumule, Testa
(d) Radicle, Cotyledon, Plumule
Name the parts A, B and C shown in the following diagram and state one function of each.
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
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
State the function of flowers in the flowering plants.
How is the process of pollination different from fertilization?
The anther contains ______.
Sketch the reproductive parts of a flower.
Where are a plant's sex organs located?
Fill in the following blank with suitable word :
Ovules contain ......... gametes of a plant.
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
How is the process of pollination different from fertilization?
Give some examples of different modes of fertilisation in nature?
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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)
In the figure given alongside, the parts marked A, B and C are sequentially:
| 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?
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:
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
Differentiate between self-pollination and cross-pollination.
__________ is present in unisexual flower.
Draw a neat and labelled diagram.
Double fertilization in angiosperms
Identify the parts A, B, C, and D?
In which part of the flower germination of pollen grains takes place?
Antipodal cells are present towards the ______ in an anatropous ovule.
Pineapple fruit develops from ______.
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 ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
In a plant flower the female whorl is ______.
Name the reproductive parts of an angiosperm. Where are these parts located? Explain the structure of its male reproductive part.
