MCQ
Most mollusc are
- ATerrestrial
- BFresh water
- ✓Marine
- DNone of these
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$R$ : Bark is formed due to the activity of phellogen only.
$(i)$ They are found in aquatic habitats and on decaying wood in moist and damp places.
$(ii)$ Mycelium is aseptate and coenocytic.
$(iii)$ Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
$(iv)$ Some common examples are Mucor, Rhizopus and Albugo.

$A$. Maintenance of water and electrolyte balance
$B$. Regulation of basal metabolic rate
$C$. Normal rhythm of sleep-wake cycle
$D$. Development of immune system
$E$. Support the process of RBCs formation
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