the outer wall of pollen grain is called?
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Exine which is made up of sporopollinin( which is one of the most resistant organic substance on earth).
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The outer wall of pollen grain is called Exine.
- Exine is made up of sporopollenin.
- Exine is formed by tapetum.
- Exine is sporophytic in origin.
- Exine is discontinuous because of germ spore.
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