Basic Science : Phylum Arthropoda QUESTIONS AND ANSWERS :: part11 : 16 to 20
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
16.Class bivalvia is characterized by |
| Presence of tentacles around mouth |
| Absence of head |
| Coiled shell |
| Absence of gills |
17.Ink gland occurs in |
| Asterias |
| Sepia |
| Pila |
| Fasciola |
18.Eyes of Pila/mollusks occur over |
| Pseudopodia |
| Ommatophores |
| Cephalic tentacles |
| Both B and C |
19.Which molluscan group is primarily used in pearl production? |
| Pelecypods |
| Gastropods |
| Cephalopods |
| Monoplacophorans |
20.Animals producing natural pearls belong to |
| Echinodermata |
| Cyclostomata |
| Mollusca |
| Fishes |
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