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प्रश्न
Give some examples of different modes of fertilisation in nature?
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उत्तर
There are two modes of fertilisation, i.e., external fertilisation as seen in case of fishes and frogs, and internal fertilisation that happens in humans, dogs, etc.
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संबंधित प्रश्न
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
Mature ovary forms the ______.
Name the swollen lower part of the carpel.
Fill in the following blank with suitable word :
The ovule becomes a .......... after fertilisation.
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
What is made in anther of a flower?
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
What part is played by stamens and carpels in reproduction?
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
Describe an activity to demonstrate phototropism.
Differentiate between self-pollination and cross-pollination.
Bisexual : Hibiscus : : Unisexual : ___________
Flowers showing ornithophily show few characteristic like ______.
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
Length of pollen tube depends on the distance between ______
Double fertilization is exhibited by ______
What are the agents for pollination?
Type of sexual reproduction is ______.
