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प्रश्न
Sketch the labelled diagram.
Flower with its sexual reproductive organs.
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उत्तर
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संबंधित प्रश्न
State the function of flowers in the flowering plants.
How is the process of pollination different from fertilization?
Sketch the reproductive parts of a flower.
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 part made up of the stigma, style and ovary.
What are the reproductive organs in a flower?
Fill in the following blank with suitable word :
Ovules contain ......... gametes of a plant.
Fill in the following blank with suitable word :
The ovule becomes a .......... after fertilisation.
What is made in ovary of a flower?
Explain the terms 'cross-pollination'?
How do the insects help in cross-pollination?
What type of plants reproduce by sexual reproduction method?
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?
The students of a class were asked by the teacher to study the different parts of an embryo of an angiosperm. Given below are the essential steps for the experiment :
A. Soak the seeds in plain water and keep them overnight.
B. Cut open the soaked seed and observe its different parts.
C. Take some healthy seeds in a petri-dish.
D. 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) C, A, D, B
(b) C, D, A, B
(c) A, C, D, B
(d) A, C, B, D
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
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Describe an activity to demonstrate phototropism.
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
What does germination mean?
Draw a neat and labelled diagram.
Double fertilization in angiosperms
Observe the figure below. Write functions of the labelled parts.
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.
The ovule of an angiosperm is technically equivalent to ______
Which of the following is the outermost protective layer of anther?
The process of release of eggs from the ovary is called ______
In human beings, fertilization occurs in the ______
Pollen grains are produced by ______
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
Triple fusion involves ______.
State the post-fertilisation changes that lead to fruit formation in plants.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
In male reproductive whorl of a flower the archesporial cells are formed by ______.
