MCQ
Which disease affects skeletal muscles?
- AArthritis
- BOsteoporosis
- ✓Myasthenia gravis
- DNone of these
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion $(A)$:All vertebrates are chordates but all chordates are not vertebrates.
Reason $(R)$:Notochord is replaced by vertebral column in the adult vertebrates.
In the light of the above statements, choose the most appropriate answer from the options given below:
| Column $I$ | Column $II$ | ||
| $A.$ | Porifera | $i.$ | Canal system |
| $B.$ | Aschelminthes | $ii.$ | Water$-$vascular system |
| $C.$ | Annelida | $iii.$ | Muscular pharynx |
| $D.$ | Arthropoda | $iv.$ | Jointed appendages |
| $E.$ | Echinodermata | $v.$ | Metameres |