Endothecium is responsible for ______________ of pollen grains.
i) nutrition
ii) protection
iii) dehiscence

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i & ii

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ii & iii

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Solution

The correct option is C ii & iii
Endothecium is a layer in the wall of a sac-like structure present in anther called microsporangium. It is responsible for both the protection and dehiscence of pollen grains from the anther.
Another layer of microsporangia called tapetum is responsible for the nourishment of pollen grains.

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Similar questions

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. Based on the given excerpt, answer the given question.

Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

Endothecium is responsible for ______________ of pollen grains.

i) nutrition
ii) protection
iii) dehiscence
[1 mark]

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. 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.

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Structure of Microsporangium

Standard XIII Biology

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Endothecium is responsible for ______________ of pollen grains. i) nutrition ii) protection iii) dehiscence

Endothecium is responsible for ______________ of pollen grains.
i) nutrition
ii) protection
iii) dehiscence