MCQ
Alga rich in protein is:
- ✓Chlorella
- BSpirogyra
- COscillatoria
- DUlothrix
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| Column $I$ | Column $II$ |
| ($a$) Aptenodytes | ($i$) Flying fox |
| ($b$) Pteropus | ($ii$) Angel fish |
| ($c$) Pterophyllum | ($iii$) Lamprey |
| ($d$) Petromyzon | ($iv$) Penguin |
$(i)$ Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
$(ii)$ Gizzard helps in grinding the food particles.
$(iii)$ A ring of $6-8$ blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice.
$(iv)$ At the junction of midgut and hindgut is present another ring of $100-150$ yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph.