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5 × tobacco mosaic virus 5 × mutagen 5 × mutation breeding 5 × plant introduction 5 × endoplasmic reticulum 5 × double-fertilization 5 × cohesion-tension 5 × bud-scale 5 × antheridiophore 5 × parallel-venation 5 × strobilus 5 × nitrogen-cycle 5 × krebs-cycle 5 × calvin-cycle 5 × photoperiodism 5 × senescence 5 × cytokinin 5 × abscission 5 × moss 5 × protoplast 5 × hydrolysis 5 × anther 4 × rna polymerase 4 × embryogenesis 4 × cyclosis 4 × facultative anaerobes 4 × plant hormone 4 × cross pollination 4 × abscisic-acid 4 × polar nucleus 4 × sporangiophore 4 × homospory 4 × repressor-protein 4 × gene-expression 4 × archegoniophore 4 × calyptra 4 × genotypic-ratio 4 × nitrogen-fixation 4 × anaerobic-respiration 4 × conidia 4 × micropyle 4 × operculum 4 × antheridium 4 × stomata 4 × pseudomonas 4 × pistil 4 × mycelium 4 × imbibition 4 × ferns 4 × anabaena 4 × lactobacillus 4 × microspore 4 × cell 3 × genomics 3 × eukaryotic cell 3 × air layering 3 × tissue culture 3 × somatic hybrid 3 × pressure flow hypothesis 3 × middle lamella