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प्रश्न
Draw a neat and labelled diagram.
Double fertilization in angiosperms
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उत्तर
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संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
State the function of flowers in the flowering plants.
How does the process of fertilisation take place in flowers?
The process of fusion of the male and female gametes is called ______.
Where are a plant's sex organs located?
Where is the female gamete formed in flowering plants?
What is made in ovary of a flower?
Explain the terms 'self pollination'
How is the process of pollination different from fertilization?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
(a) Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
(b) What name is given to (i) all the petals of a flower, and (ii) all the sepals of a flower?
(c) What are (i) stamen, and (ii) carpel, in a flower?
(d) What is the other name of carpel of a flower?
(e) What is the name of yellow powdery substance present in the anther of a flower?
In what ways is fertilisation in a plant similar to fertilisation in a human?
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Fill in the blanks:
A stamen consists of ______ and ________.
In the figure, the parts marked A, B and C are sequentially:
(A) Plumule, Radicle and Cotyledon
(B) Radicle, Plumule and Cotyledon
(C) Plumule, Cotyledon and Radicle
(D) Radicle, Cotyledon and Plumule
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
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
Calyx : Sepals : : Corolla : ________________
Bisexual : Hibiscus : : Unisexual : ___________
Pollen grains from anther are transferred to the stigma.
What does germination mean?
Observe the figure below. Write functions of the labelled parts.
The male reproductive part of a flower is ______.
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
Which of the following are the chemical components of the wall of pollen tube?
Generally, in a pollen tube, which of the following moves to the tip of the tube?
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
The seed that contains the future plant is called the ______
Pollen grains are produced by ______
Which out of the following processes does not lead to the formation of clones.
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.
Give any two examples of agents of pollination.
What is puberty?
Explain the post fertilization changes that occur in the ovary of a flower.
