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प्रश्न
What type of cell division occurs during microsporogenesis and megasporogenesis events?
उत्तर
Both events (microsporogenesis and megasporogenesis) involve the process of meiosis or reduction division, which results in the formation of haploid gametes from the microspore and megaspore mother cells.
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संबंधित प्रश्न
A moss plant is unable to complete its life cycle in a dry environment. State two reasons.
A flower of brinjal plant following the process of sexual reproduction produces 360 viable seeds.
Answer the following questions giving reasons:
(a) How many ovules are minimally involved?
(b) How many megaspore mother cells are involved?
(c) What is the minimum number of pollen grains that must land on stigma for pollination?
(d) How many male gametes are involved in the above case?
(e) How many microspore mother cells must have undergone reduction division prior to dehiscence of anther in the above case?
Arrange the following terms in the correct developmental sequence:
Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes.
Explain the role of tapetum in the formation pollen-grain wall.
State the sporopollenin significance with reference to its chemical nature.
Describe the different types of vascular bundles.
Draw a labelled diagram of a typical anatropous ovule.
The functions of tapetum is to ______.
When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is known as ______.
Point out the odd one.
In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by ______.
The anther wall consists of four wall layers where ______.
In angiosperms various stages of reductional division can best be studied in ______.
The three cells found in a pollen grain when it is shed at 3-celled stage are ______.
In Zostera, the pollen grains are long and ribbon-like and released inside the water.
Mark the odd one.
Heliophytes are ______.
