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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.
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
A non biology person is quite shocked to know that apple is a false fruit, mango is a true fruit and banana is a seedless fruit. As a biology student how would you satisfy this person ?
Why does endosperm development precede embryo development in angiosperm seeds?
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.
In dicots, the pollen grains are usually ______
A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be ______.
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be ______.
Double fertilization leading to initiation of endosperm in angiosperms require ______.
Mark the odd one.
