MCQ
"Portuguese man of war" is
- ASoldier of world war $I$
- BPortuguese soldier
- CA sponge
- ✓A polymorphic, colonial, coelenterata
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| Column $I$ | Column $II$ |
| $A.$ Synapsis aligns homologous chromosomes | $(i)$ Anaphase $II$ |
| $B.$ Synthesis of $RNA$ and protein | $(ii)$ Zygotene |
| $C.$ Action of enzyme recombinase | $(iii)$ $G_2$ phase |
| $D.$ Centromeres do not separate but chromatids move towards opposite poles | $(iv)$ Anaphase $I$ |
| $(v)$ Pachytene |
$I.$ Primary and secondary phloem gets crushed during secondary growth
$II.$ During secondary growth, primary xylem remains more or less intact
$R-$ Tropomyosin is a rod - shaped fibrous protein. Tropomyosin forms two helical strands, which are wrapped around the $G-$ actin.