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प्रश्न
Pollen grains are formed by _________ division in locules of anthers.
पर्याय
meiosis
mitosis
amitosis
binary
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उत्तर
Pollen grains are formed by meiosis division in locules of anthers.
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संबंधित प्रश्न
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
Name the parts A, B and C shown in the following diagram and state one function of each.
State the function of flowers in the flowering plants.
A flower may have either male or female reproductive parts. Such a flower is called ______.
Sketch the reproductive parts of a flower.
The reproductive part of a plant is the ______.
Name the swollen lower part of the carpel.
Explain the terms 'self pollination'
Explain the terms 'cross-pollination'?
Name the part of a seed which contains stored food.
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?
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(a) pollination, fertilisation, seed, embryo
(b) seed, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seed
(d) embryo, seed, pollination, fertilisation
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
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
Fill in the blank by selecting suitable word:
A flower that bears both the male and the female parts is known as __________ flower.
Fill in the blank:
Seeds are formed from________.
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Explain the process of fertilisation in flowers.
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
List any two differences between pollination and fertilization.
Identify the odd. Stigma, Style, Pollen, Ovary.
Explain sexual reproduction in plants.
Answer the following question.
How does suitable pollination lead to fertilization?
Bisexual : Hibiscus : : Unisexual : ___________
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Discuss the first event and write the types.
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Which of the following is the outermost protective layer of anther?
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 flower of the Hibiscus plant is ______
Pollen grains are produced by ______
Length of pollen tube depends on the distance between ______
The ovaries of different flowers may contain ______.
State the number of sets of chromosomes present in a zygote.
What are the agents for pollination?
Type of sexual reproduction is ______.
In male reproductive whorl of a flower the archesporial cells are formed by ______.
