MCQ
In Paraecium, cilia helps in
- AMovement of cytopharynx
- BLocomotion
- ✓Both $(a)$ and $(b)$
- DReproduction
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| S.no. | Animals | Morphological features | |
| $(i)$ | Crocodile | $-$ | $4-$chambered heart |
| $(ii)$ | Sea urc hin | $-$ | Parapodia |
| $(iii)$ | Obelia | $-$ | Metagenesis |
| $(iv)$ | Lemur | $-$ | Thecodont |
$(i)$ Contractile vacuole takes part in osmoregulation and excretion.
$(ii)$ Food vacuole is formed by engulfing the food particles.
$(iii)$ The vacuole is bound by a double membrane called tonoplast.
$(iv)$ Vacuole can occupy upto $90$ percent of the volume of the cell.
$I.$ Occurs between $G_1$ and $G_2$
$II.$ $DNA$ replication begins in the nucleus
$III.$ Centrioles duplicate in the cytoplasm
$IV.$ As $DNA$ s doubled, number of chromosomes also doubles Option are