Basic Science : Phylum Arthropoda QUESTIONS AND ANSWERS :: part9 : 21 to 25
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
21.Limax and Helix respire with the help of |
| Ctenidia |
| General body surface |
| Pulmonary sac |
| Buccal cavity |
22.Tentacles of Sepia possess suckers |
| All along the inner surface |
| All along the outer surface |
| Both A and B |
| At the tips |
23.Teredo is harmful to boats and ships as it can |
| Digest cellulose |
| Bore a hole in the hull |
| Adhere to hull |
| All the above |
24.Pearl is secreted when a foreign particle happens to enter between |
| Ostracum and periostracum |
| Periostracum and hypoostracum |
| Shell and mantle |
| Inside mantle cavity |
25.The two valves of Unio are hinged |
| Dorsally |
| Ventrally |
| Anteriorly |
| Posteriorly |
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