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प्रश्न
Pollen grains from anther are transferred to the stigma.
पर्याय
True
False
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उत्तर
True
APPEARS IN
संबंधित प्रश्न
Name and differentiate between the two modes of pollination in flowering plants.
Give one example of a unisexual flower.
Mention the changes a flower undergoes after fertilisation.
Explain what you understand by sexual reproduction.
State the name of the functional unit concerned with sexual reproduction.
Name the male part of the flower.
Where are a plant's sex organs located?
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
What is made in ovary of a flower?
How do the insects help in cross-pollination?
How is the process of pollination different from fertilization?
What is seed?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
What is meant by ‘unisexual flowers’?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
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.
You have to perform the experiment, "To identify the different parts of an embryo of a gram seed." Describe the procedure that you would follow.
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
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
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.
Explain sexual reproduction in plants.
Bisexual : Hibiscus : : Unisexual : ___________
The ovule of an angiosperm is technically equivalent to ______
Identify the female gametophyte in angiosperms.
Sperm and egg nuclei fuse due to ______.
The flower of the Hibiscus plant is ______
In human beings, fertilization occurs in the ______
Double fertilization is exhibited by ______
What is the function of calyx?
Triple fusion involves ______.
In flowering plants, the pollen grains are transferred to stigma by pollination but the female germ cells are present in the ovary.
Explain with the help of a labelled diagram (only concerned parts), how the male germ cell reaches the ovary.
Explain the post fertilization changes that occur in the ovary of a flower.
The number of pollen sacs in a dithecous anther is ______.
