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Question
How is the process of pollination different from fertilization?
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Solution 1
- Pollination is the process of transfer of pollens from anther to stigma. It occurs with the help of certain pollinators such as air, water, birds, or some insects.
- Fertilization is the fusion of the male and female gametes. It occurs inside the ovule and leads to the formation of a zygote.
Solution 2
| Pollination | Fertilization |
| The transport of pollen grains from the anther to the stigma is called pollination. | The funion of male and female games is called fertilization. |
| In this, the cells are not attached. | In this, the male and female cells are joined. |
| Usually, one has to wait for carriers to complete this action. | This action is transactional. |
RELATED QUESTIONS
A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below:
Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon.
On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
(a) Testa, Radicle, Cotyleddon
(b) Tegmen, Radicle, Micropyle
(c) Cotyledon, Plumule, Testa
(d) Radicle, Cotyledon, Plumule
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
Ovules contain ......... gametes of a plant.
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
Explain the terms 'cross-pollination'?
Give some examples of different modes of fertilisation in nature?
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 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?
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
Explain the process of fertilisation in flowers.
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.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
Pollen grains are formed by _________ division in locules of anthers.
The anther wall consists of four wall layers where ______
The ovule of an angiosperm is technically equivalent to ______
In a flowering plant, archesporium gives rise to ______.
Which out of the following processes does not lead to the formation of clones.
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
The number of pollen sacs in a dithecous anther is ______.
