MCQ
Needle like foliage leaves are found in
- AMosses
- BSelaginella
- CFern
- ✓Pinus
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$I.$ Each actin (thin filament) is made up of $2 \mathrm{~F}$ (filamentous) actins
$II.$ $F-$actin is the polymer of G (globular) actin
$III.$ $2 \mathrm{~F}=$ actins are twisted into a helix
$IV.$ Two strands of tropomyosin (protein) lies in the grooves of $F-$actin
The correct option is
$(1)$ Rhodophyceae - Pyrenoids
$(2)$ Pheiophyceae - Laminarin
$(3)$ Bryophytes - Mannitol
$(4)$ Chlorophyceae - Floridean starch