Advertisements
Advertisements
प्रश्न
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
Advertisements
उत्तर
After fertilisation, the eggs in the ovule grow and develop into seeds. The ovule develops a thick coating and forms the seed, whereas the ovary develops into a fruit that contains the seed.
APPEARS IN
संबंधित प्रश्न
Name and differentiate between the two modes of pollination in flowering plants.
What are the reproductive organs in a flower?
What is made in anther of a flower?
Explain the terms 'cross-pollination'?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
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
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
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
Identify the odd. Stigma, Style, Pollen, Ovary.
Prepare a slogan for campaign against female foeticide.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
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
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
Pollen grains are formed by _________ division in locules of anthers.
The essential parts of a flower are ______.
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
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.
