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प्रश्न
Angiosperms bearing unisexual flowers are said to be either monoecious or dioecious. Explain with the help of one example each.
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उत्तर
Flowers that possess either stamens (male) or carpels (female) are called unisexual flowers. The plants possessing both male and female flowers in the same plant are are called monoecious and when male and female flowers are present on different plants, they are known as dioecious.
Example of monoecious plants: Cucurbits and coconut
Example of dioecious plants: Papaya and date palm
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संबंधित प्रश्न
Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.
Describe the formation of helobial endosperm
In which of the following the primary endosperm nucleus undergoes free nuclear division or karyokinesis?
Identify the ploidy of embryo and endosperm respectively formed after following cross.
An angiospermic male plant with 24 chromosomes in its pollen mother cells is crossed with female plant bearing 24 chromosomes in its root cells.
Identify the CORRECT statement/s from the following.
i. In post-fertilization changes within the ovule, the development of embryo is followed by the development of endosperm.
ii. Helobial endosperm is intermediate between cellular and nuclear type endosperm.
iii. Helobial endosperm is mostly observed in 72 families of dicots.
At what stage of endosperm development, will you observe nuclear or cellular type of endosperm?
In angiosperms, triple fusion is required for the formation of ______.
Indentify the wrong statement regarding post-fertilisation development.
The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes?
The type of evolution where the central part is occupied by free nuclear and the peripheral part by cells is observed in ______.
