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Earthworms are known as 'Friends of farm...

Earthworms are known as 'Friends of farmers. Give reason.

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CHETANA PUBLICATION-Kingdom Animalia -Exercise
  1. Earthworms are known as 'Friends of farmers. Give reason.

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  2. Which of the following belongs to a minor phylum?

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  3. …………………………has a venous heart.

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  4. In Ascaris…………… .

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  5. Which of the following is incorrect in case of birds?

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  6. Chitinous exoskeleton is a characteristic of………… .

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  7. The body plan in which the alimentary canal has a single opening is ca...

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  8. The tube within tube plan is not present in………….. .

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  9. The body wall of Hydra is………… .

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  10. The salient character of Arthropoda is…………… .

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  11. Organs of Bojanus' is characteristic feature of…………….. .

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  12. Which of the following are exclusively marine animals?

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  13. Water vascular system is the unique character of…………… .

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  14. Notochord is absent in the group………….. .

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  15. Excretion and osmoregulation in Earthworm is by………….. .

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  16. Mammary glands are modified……………. .

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  17. Which of the following animals show cellular grade of organisation?

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  18. Mode of digestion in sponges is…………. .

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  19. Which of the following animals is radially symmetrical?

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  20. A characteristic of coelenterate only, is the occurrence of……….. .

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  21. Nervous system first originated in…………… .

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