Question

list 3 characteristic features of invertebrate animals .​

Answer 1

Explanation:

1. Respiratory System
2. Protozoans, Sponges, Coelenterates and many worms have a direct diffusion of gases.
3. Annelids exchange gases through moist skin.

• Gills are present in higher invertebrates.

1. Echinoderms possess branchiae and tube feet for respiration.
2. In insects, the tracheal system is adapted for aerial respiration.

Answer 2

Answer:

Protozoans, Sponges, Coelenterates and many worms have a direct diffusion of gases.

Annelids exchange gases through moist skin.

Gills are present in higher invertebrates.

Echinoderms possess branchiae and tube feet for respiration.

In insects, the tracheal system is adapted for aerial respiration.

Explanation:

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