Choose the correct sequence of layers surrounding the microsporangium in angiosperms.

Tapetum - epidermis - middle layers - endothecium .

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Epidermis - middle layers - endothecium - tapetum.

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Endothecium - middle layers - tapetum- epidermis.

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Epidermis - endothecium - middle layers - tapetum.

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Solution

The correct option is D Epidermis - endothecium - middle layers - tapetum.
Microsporangium is surrounded by four wall layers. The correct sequence of layers is epidermis - endothecium - middle layers - tapetum.
Outer three layers are– the epidermis, endothecium, middle layers. The tapetum is the innermost layer.

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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

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}

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}

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Structure of Microsporangium

Standard XII Biology

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