MCQ
A pair of external nostrils present in humans opens out
- ABelow the upper lips
- ✓Above the upper lips
- CBetween upper and lower lips
- DAbove the larynx
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Excretory structure/ organ | | Animals | |
| A | Protonephridia | i. | Prawn |
| B | Nephridia | ii. | Cockroach |
| C | Malpighian tubules | iii. | Earthworm |
| D | Green gland or Antennal gland | iv. | Flatworms |