Ncert Exercises & Solutions

Match the following list of animals with their level of organisation.

Animal	Division of Labour
i. Pheretima ii. Fasciola iii. Spongilla iv. Obelia	A. Organ level B. Cellular aggregate level C. Tissue level D. Organ system level

Choose the correct match showing division of labour with animal example.
1. (i)-B, (ii)-C,(iii)-D and (iv)-A
2. (i)-B, (ii)-D,(iii)-C and (iv)-A
3. (i)-D, (ii)-A, (iii)-B and (iv)-C
4. (i)-A,(ii)-D,(iii)-C and (v)-B

(c) (i)-D, (ii) - A, (iil)-B, (iv) - C

Pheretima possesses organ system level of organisation.

Fasciola possesses organ level organisation.

Spongilla possesses cellular aggregate level organisation.

Obelia possesses tissue level organisation.

Page 46-47, XI NCERT

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