Basic Science : Phylum Arthropoda QUESTIONS AND ANSWERS :: part14 : 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.Which one is absent in echinoderms |
| Nervous system |
| Muscular system |
| Cephalisation |
| All the above |
17.Stone canal of Star Fish is |
| Straight |
| Rounded |
| Pentangular |
| S-shaped |
18.In echinoderms, ossicles are |
| Exoskeletal plates |
| Endoskeletal plates |
| Regions of ambulacral grooves |
| Regions from where oral tentacles develop |
19.Ophiura is |
| Brittle Star |
| Feather Star |
| Sand Dollar |
| Sea Lily |
20.Pinnules occur over the arms of |
| Asterias |
| Antedon |
| Astropecten |
| Holothuria |
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