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Answer the following questions by choosing correct option.

a. Which special cells are present in the body of sponges (Porifera)? 1. Collar cells. 2. Cnidoblasts. 3. Germ cells. 4. Ectodermal cells. b. Which of the following animals’ body shows bilateral symmetry? 1. Star fish. 2. Jelly fish. 3. Earthworm. 4. Sponge. c. Which of the following animals can regenerate it’s broken body part? 1. Cockroach. 2. Frog. 3. Sparrow. 4. Star fish. d. Bat is included in which class? 1. Amphibia. 2. Reptilia. 3. Aves. 4. Mammalia
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