MCQ
Digestion in coelenterates is
- AOnly intracellular
- BOnly extracellular
- ✓Both extracellular and intracellular
- DNot required
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| Column-$I$ | Column-$II$ |
| (Cell type) | (Size) |
| $A$. Viruses | $I$. $1-2\; mm$ |
| $B$. $PPLO$ | $II$. $10-20\; mm$ |
| $C$. Eukaryotic cell | $III$. About $0.1\; mm$ |
| $D$. Bacterium | $IV$. $0.02-0.2\; mm$ |
$(I)$ It is located on the dorsal side of forebrain.
$(II)$ It plays very important role in the regulation of $24$ hour rhythum of our body.
$(III)$ It helps in maintaining the body temperature
$(IV)$ It's hormone, influences the metabolism as well as defense capability.
$(i)$ Growth cannot be taken as a defining property of living organism.
$(ii)$ Dead organism does not grow.
$(iii)$ Reproduction cannot be an all inclusive defining characteristic of living organisms.
$(iv)$ No non-living object is capable of replicating itself.
$(v)$ Metabolism in a test tube is non-living.
$(vi)$ Metabolism is a defining feature of all living organisms.