MCQ
It is not modification of stem for climbing
- ✓Citrus
- BPumpkins
- CCucumber
- DWatermelon
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$R$ : Bark is formed due to the activity of phellogen only.
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces,Trypanosoma, Porphyra, Wolffia