In angiosperms,all four microspores of a micr | vedclass

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(B) In angiosperms,the microspore mother cell $(MMC)$ undergoes meiosis to form a cluster of four haploid microspores,known as a microspore tetrad.The

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Callose

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(B) In angiosperms,the microspore mother cell $(MMC)$ undergoes meiosis to form a cluster of four haploid microspores,known as a microspore tetrad.These four microspores are held together by a special layer of polysaccharide called $Callose$.As the anther matures and dehydrates,the enzyme $Callase$ is secreted by the tapetum,which degrades the $Callose$ layer,allowing the microspores to dissociate and develop into pollen grains.

In angiosperms,all four microspores of a microspore tetrad are covered by a layer which is made up of ........

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