MCQ
The stage upto which glycolysis and fermentation is common
- ADihydroxy acetone
- B$3$-phosphoglyceraldehyde
- ✓Pyruvate
- DGlucose-$6$-phosphate
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The glands which are represented as $X$, $Y$ and $Z$ are
(column-$I$) with one characteristic
(column $II$), and the phylum/class
(column $III$) to which it belongs
Column $I$ - Column $II$ - Column $III$
| Option | Characteristics | Class |
| $(a)$ | Sucking and circular mouth; jaws absent, integument without scales; paired appendages. | Cyclostomata |
| $(b)$ | Body covered with feathers; skin moist and glandular, fore-lims form wings; lungs with air sacs. | Aves |
| $(c)$ | Mammary gland; hair on body; pinnae; two pairs of limbs. | Mammalia |
| $(d)$ | Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord. | Chondrichthyes |