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Question

Identify the parts labelled in the given transverse section of anther.


A

(i) - Epidermis, (ii) - Endothecium, (iii) - Middle layers, (iv) - Tapetum

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B

(i) -Tapetum, (ii) - Middle layers, (iii) - Endothecium, (iv) - Epidermis

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C

(i) - Epidermis, (ii) - Tapetum, (iii) - Middle layers, (iv) - Endothecium

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D

(i) - Endothecium, (ii) - Epidermis, (iii) - Middle layers, (iv) - Tapetum

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Solution

The correct option is B

(i) -Tapetum, (ii) - Middle layers, (iii) - Endothecium, (iv) - Epidermis


The centrifugal (from centre to periphery) arrangement of different layers of anther wall is (i) tapetum, the tissue which gives nutrition to the developing sporogenous tissue; (ii) 4-5 layered middle layers; (iii) single layered endothecium with hygroscopic fibrils which help in dehiscence of the anther to release pollen and finally, (iv) the outer protective epidermis.


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