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  4. In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by

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Q. In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by

Rajasthan PMTRajasthan PMT 2007

Solution:

The deposition of callose starts in pollen mother cell as it enters meiosis and is complete by the end of first meiotic division. By the time tetrad are formed, the common callose wall dissolves even then all the four micro-spores lie within a common callose wall.