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प्रश्न
Explain the terms 'cross-pollination'?
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उत्तर
In cross pollination, pollens from the anther of one flower are transferred to the stigma of the another flower of another plant but of the same species.
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संबंधित प्रश्न
What is pollination?
Name and differentiate between the two modes of pollination in flowering plants.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The ovary of a flower becomes ....... after fertilisation.
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
Describe the process of fertilisation in a flower with the help of labelled diagrams.
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?
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.
“Cell division is a type of reproduction in unicellular organism.” Justify.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Find the odd one out:
Bisexual : Hibiscus : : Unisexual : ___________
Define.
Inflorescence
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
The ovule of an angiosperm is technically equivalent to ______
In a flowering plant, archesporium gives rise to ______.
The seed that contains the future plant is called the ______
Given below is a diagram of a germinating seed. Label the parts that:
- gives rise to future shoot.
- gives rise to future root system.
- stores food.
