Match the following: (a) Operculum (i) Ctenophora (b) Parapodia (ii)Mollusca (c) Scales (iii)Porifera (d) Comb plates (iv)Reptilia (e) Radula (v) Annelida (f) Hair (vi)Cyclostomata and Chondrichthyes (g) Choanocytes 

Haritha,Subject Matter Expert at Edumarz

Solution:

1. Operculum          Osteichthyes

2. Parapodia           Annelida

3. Scales                 Reptiles

4. Comb Plates       Ctenophora

5. Radula                 Mollusca

6. Hair                      Mammalia

7. Choanocytes        Porifera

8. Gill slits                Cyclostomata and Chondrichthyes 

  Explanation:

• Bony fishes contain a structure called an operculum,and this structure protects the gills.

• Parapodia are structures found in annelids to help them swim.

• Scales are tough,dry skin present in reptiles.It gives protection and also helps in adapting to a dry environment.

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• Comb plates present in ctenophora help in locomotion.

• Radula is the structure that helps in consuming food.It is located in the buccal cavity of the mollusca.

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• In mammals,hair helps in protecting their bodies from changing environmental conditions.

• Choanocytes are the cells present inside the body walls of sponges.It helps in the transport of water and also traps food items.

Gill slits helps in feeding and exchange gases in fishes