MCQ
Which of the given is/are examples of differentiation?
- ALoss of nucleus and perforations in some sieve tube members
- BLignin deposition in tracheids and vessels
- CDifferential wall thickening in guard cells
- ✓More than one option is correct
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$I$. sporophyte is multicellular, not free living but attached to the gametophyte for nourishment from it
$II$. some cells of the sporophyte undergo meiosis to produce haploid spores
$III$. these spores germinate to produce gametophyte
$A$. Presence of a mid-dorsal, solid and double nerve cord.
$B$. Presence of closed circulatory system.
$C$. Presence of paired pharyngeal gill slits.
$D$. Presence of dorsal heart
$E$. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below: