MCQ
Cotton threads are made of:
- ✓Cellulose
- BProtein
- CAmino acid
- DGlucosamine
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$(1)$ Rhodophyceae - Pyrenoids
$(2)$ Pheiophyceae - Laminarin
$(3)$ Bryophytes - Mannitol
$(4)$ Chlorophyceae - Floridean starch
$R$ : Sapwood contains actively conducting vessels and occupies central part of stem.