How many wall layers surround a typical micro | vedclass

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(D) typical microsporangium is surrounded by four wall layers. These layers are: $1$. Epidermis (outermost layer) $2$. Endothecium $3$. Middle layers

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Four

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(D) typical microsporangium is surrounded by four wall layers. These layers are: $1$. Epidermis (outermost layer) $2$. Endothecium $3$. Middle layers $4$. Tapetum (innermost layer) The outer three layers perform the function of protection and help in the dehiscence of anther to release the pollen. The innermost wall layer,the tapetum,nourishes the developing pollen grains.

How many wall layers surround a typical microsporangium?

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