Biology 9 Chapter 8 - Test 5

1. Discharging of surplus water by contractile vacuoles in paramecium is also called __________.


2. Paramecium posses ___________ nuclei.


3. Mega nucleus of paramecium regulate __________ activities.


4. Micronucleus in paramecium controls ________.


5. The animals of phylum porifera are generally called _________.


6. Sponges have no organs or ________ tissues.


7. Green colour of sponge is due to _________ that live in their body.


8. Sponges may live signally or may form branched _________.


9. _________ animals cannot move and remain attached to stone and rocks.


10. Sycon is an example of marine _________.


11. Sycon has a skeleton made up of _________.


12. In glass sponges skeleton is ________ due to which it looks very shiny.


13. Coelentrates having a special cavity in their body is called _________.


14. Coelentrates are ________ animals having their body two layers of cells.


15. A gelatinous material present between two layers in the body of coclentrates is called ________.


16. Tentacles are provided with many ________ cells which act as organs of defence and ofence.


17. Hydra captures prey by ________ it with stinging cells.


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