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Hard calcium carbonate structures are us...

Hard calcium carbonate structures are used as skeleton by

A

Arthropoda

B

Echinodermata

C

Nematoda

D

Protochordata

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The correct Answer is:
B
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LAKHMIR SINGH & MANJIT KAUR-DIVERSITY IN LIVING ORGANISMS-Diversity In Living Organisms
  1. Insects have compound eye made up of several units. Each unit is :

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  2. Pick the odd one out

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  3. Hard calcium carbonate structures are used as skeleton by

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  4. Hard calcium carbonate structures are used as skeleton by :

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  5. Which of the following animals possesses a water vascular system ?

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  6. Which of the following is an aquatic adaptation ?

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  7. Which of the following has two chambered heart ?

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  8. A specimen of a fish was given to identify the extrenally visible chro...

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  9. The gills in which one of the following are convered with operculum ?

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  10. Dorsal, pelvic, pectoral and tail fins are for locomotion in

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  11. Bony fishes are characterised by :

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  12. Observe the pictures of fish and a bird. The feature that places them ...

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  13. Which of the following show aquatic adaptation ?

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  14. Which of the following adaptation is not found in a fish ?

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  15. The fish which may have given rise to terrestrial vertebrates is :

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  16. What is the role of air bladder in fishes ?

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  17. Choose option which includes the feature that helps the fish to change...

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  18. Which adaptation of the frog differentiates it from the fish ?

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  19. Which of the following has three chambered heart ?

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  20. Which of the following is not an amphibian

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