Basic Science : Kingdom Animalia Metazoa QUESTIONS AND ANSWERS :: part5 : 6 to 10
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
6.Many sponges may be bigger than fishes, yet they do not have respiratory organs because they |
| Are sedentary |
| Have porous body |
| Respire anaerobically |
| Do not require them |
7.Pinacocytes are |
| Ectodermal |
| Mesodermal |
| Endodermal |
| Interstitial cells |
8.Myocytes of sponges show |
| Contractibility |
| Nervous excitation |
| Secretion of fibres |
| All the above |
9.Sponges are characterized by |
| Absence of organs and tissues |
| Presence of tissues but absence of organs |
| Presence of both tissues and organs but absence of organ systems |
| Absence of cells |
10.Sponges are |
| Planktonic |
| Nectonic |
| Neuston |
| Sedentary |
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