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प्रश्न
Describe the structure of its microsporangium.
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उत्तर
A microsporangium is a cylindrical sac which appears circular in the transverse section. It contains the following parts:
(1) Outer wall
(2) Central homogeneous sporogenous tissue
(3) Epidermis
(4) Endothecium
(5) 1–3 middle layers and tapetum
The outer three layers perform the function of protection in the younger anther andthe mechanism of dehiscence in the ripe anther.The endothecial cells develop fibrous thickening of α-cellulose on the inner and radial walls and die. The innermost layer is called the tapetum. It nourishes the developing pollen grain.
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संबंधित प्रश्न
Select and write the most appropriate answer from the given alternatives for the following subquestion:
A versatile anther is an adaptation for _______ type of pollination.
Give one word/term for the following:
Pollination of flowers by birds.
The question has four options. Choose the correct answer:
Pollination by insect is known as
Very short answer type question:
What is hydrophily?
Mention various adaptations for wind pollination.
For which of the following attractants and rewards are required?
Even in absence of pollinating agents seed-setting is assured in ______.
The flower which possesses both androecium and gynoecium is called perfect or ______.
Advantage of cleistogamy is:
Which of the following is classified as biotic agents of pollination?
