Advertisements
Advertisements
प्रश्न
Prepare a slogan for campaign against female foeticide.
Advertisements
उत्तर
Avoid female foeticide, save girl child
APPEARS IN
संबंधित प्रश्न
A student was asked to observe and identify the various parts of an embryo of a red kidney bean seed. He identified the parts and listed them as under:
I. Tegmen
II. Testa
III. Cotyledon
IV. Radicle
V. Plumule
The correctly identified parts among these are
(A) I, II and III
(B) II, III and IV
(C) III, IV and V
(D) I, III, IV and V
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:-
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
A flower may have either male or female reproductive parts. Such a flower is called ______.
The fusion of male and female gametes is termed as ______.
Sketch the reproductive parts of a flower.
How does the process of fertilisation take place in flowers?
Name the part of a seed which contains stored food.
How does pollination occur?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
In the figure given alongside, the parts marked A, B and C are sequentially:
In what ways is fertilisation in a plant similar to fertilisation in a human?
In what ways is fertilisation in a plant different from fertilisation in a human?
Put a tick mark (✓) against the correct alternative in the following statement
Reproductive whorls of a flower are:
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
What part is played by stamens and carpels in reproduction?
A student is asked to study the different parts of an embryo of pea seeds. Given below are the essential steps for the experiment :
(I) Soak the pea seeds in plain water and keep them overnight.
(II) Cut open the soaked seed and observe its different parts.
(III) Take some pea seeds in a petri dish.
(IV) 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) III, I, IV, II
(B) III, IV, I, II
(C) III, I, II, IV
(D) III, II, I, IV
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Mention pollination types.
Answer the following question.
How does suitable pollination lead to fertilization?
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
Pollen grains are formed by _________ division in locules of anthers.
Draw a neat and labelled diagram.
Double fertilization in angiosperms
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.
Identify the female gametophyte in angiosperms.
Gloriosa superba exhibits ______.
In a flowering plant, archesporium gives rise to ______.
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 flower of the Hibiscus plant is ______
Pollen grains are produced by ______
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
Double fertilization means ______.
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
