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punctuation triplet codons start & stop codons degeneracy codon protected area role in situ conservation overcomes are two types best types of dormancy fluorophore annular diaphragm types of microscopes microscope solar energy exhaustible coalification non commercial commercial sporopollenin pollenkit germpores microspores kernel colour in wheat eye colour in man skin colour in man sporangia of rhynia life cycle of rhynia best fossils kariogamy plasmogamy fungi