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प्रश्न
Explain the term 'fertilisation'.
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उत्तर
Fertilisation is the fusion or union of male and female gametes to form a zygote.
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संबंधित प्रश्न
Mature ovary forms the ______.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Explain the terms 'self pollination'
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 correct sequence of reproductive stages occurring in flowering plants is ______.
Put a tick mark (✓) against the correct alternative in the following statement
Reproductive whorls of a flower are:
Fill in the blank:
Seeds are formed from________.
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.
“Cell division is a type of reproduction in unicellular organism.” Justify.
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
Bisexual : Hibiscus : : Unisexual : ___________
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
The essential parts of a flower are ______.
Where does the endothecium layer of anther lobes is present?
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
Give any two examples of agents of pollination.
In a plant flower the female whorl is ______.
What are the agents for pollination?
State the post-fertilisation changes that lead to fruit formation in plants.
The number of pollen sacs in a dithecous anther is ______.
