Observe the given picture and answer the following questions:
1) Draw a neat and well labeled diagram of the animal shown in the
picture.
2) Name the phylum to which the animal belongs. Give any two examples
of organisms belonging to this phylum.
3) Why are these animals referred to as sedentary?
4) How do these animals feed?
5) The spongy body of these animals are supported by spicules. What are
these spicules made up of?
Answers
Explanation:
Phylum Porifera
These are the simplest multicellular animals, found mainly in marine habitats. These organisms have pores all over the body. They have a canal system that helps in circulating water and food particles and oxygen. The body design shows minimal differentiation and division of tissues. Commonly called as Sponges, some of the examples are Spongilla, Sycon etc.
Phylum Coelenterata
These organisms show more body differentiation. They live in water. The body has a sac-like cavity, with a single opening for ingestion an egestion. These animals have two germ layers and hence are called diploblastic. You can see these animals living solitarily or n colonies. Examples include Jellyfish, Sea Anemone, and Hydra.
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