Female gametophyte form in angiosperms
How is female gametophyte formed in the angiosperms?
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In the flower ovary there are megasporangia enclosed by tegument containing a small opening, micropyle. In megasporangium there is the megasporocyte, or megaspore mother cell, which undergoes meiosis forming four megaspores of which three moves back and only one is functional. Functional megaspore undergoes (three) mitosis generating eight cells that as a whole form embryonic sac.
Write the main difference among obligate anaerobic beings and facultative anaerobic beings?
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Why there is abandonment of ammoniotelic excretion takes place after the passage of animals from aquatic to terrestrial habitat?
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