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Structure of Microsporangium

Arrange the l...

Question

Arrange the layers of angiospermic microsporangium wall from outside to inside.

A

Epidermis, middle layers, endothecium, tapetum

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B

Epidermis, tapetum, middle layers, endothecium

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C

Epidermis, endothecium, middle layers, tapetum

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D

None of the above

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Solution

The correct option is C Epidermis, endothecium, middle layers, tapetum
Microsporangia are sac-like structures present in angiosperm anthers. It has several wall layers as depicted in the diagram:

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Similar questions

Q. Assertion :A typical microsporangium of angiosperms is generally surrounded by four wall layers- epidermis, endothecium, middle layers and tapetum. Reason: The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

Match the following.

Column - I Column - II
(i). Epidermis (a). Nutritive layer
(ii). Endothecium (b). Dehiscence of anther
(iii). Tapetum (c). Protective layer
(iv). Middle layers (d). Short-lived layer

Q. During the development of anther wall layers, if inner secondary parietal layer differentiates into tapetum and the outer secondary parietal layer divides producing endothecium and middle layer, the development of anther wall layers would confirm to .................

Match the following.

\begin{matrix} C o l u m n - I & C o l u m n - I I (i) . E p i d e r m i s & (a) . N u t r i t i v e l a y e r (i i) . E n d o t h e c i u m & (b) . D e h i s c e n c e o f a n t h e r (i i i) . T a p e t u m & (c) . P r o t e c t i v e l a y e r (i v) . M i d d l e l a y e r s & (d) . S h o r t - l i v e d l a y e r \end{matrix}

Match the following.

\begin{matrix} C o l u m n - I & C o l u m n - I I (i) . E p i d e r m i s & (a) . N u t r i t i v e l a y e r (i i) . E n d o t h e c i u m & (b) . D e h i s c e n c e o f a n t h e r (i i i) . T a p e t u m & (c) . P r o t e c t i v e l a y e r (i v) . M i d d l e l a y e r s & (d) . S h o r t - l i v e d l a y e r \end{matrix}

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Structure of Microsporangium

Standard XII Biology

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