Classification of Phylum Porifera
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Questions and Answers

What are the two types of openings found in the body surface of sponges?

Ostia and oscula

What type of animals are sponges in terms of germ layers?

Diploblastic animals

How do sponges reproduce?

Both by asexual and sexual methods

What is the characteristic skeleton of sponges made of?

<p>Either fine flexible spongin fibres, siliceous spicules, or calcareous spicules</p> Signup and view all the answers

What is the interior space of a sponge body called?

<p>Spongocoel</p> Signup and view all the answers

What distinguishes sponges from other animals in terms of respiratory and excretory organs?

<p>They are absent in sponges</p> Signup and view all the answers

What are the two types of openings found in the body surface of sponges?

<p>Ostia and oscula</p> Signup and view all the answers

Describe the body shape of sponges.

<p>Vase or cylinder-like, asymmetrical or radially symmetrical</p> Signup and view all the answers

What are the three types of skeletons found in sponges?

<p>Fine flexible spongin fibres, siliceous spicules, or calcareous spicules</p> Signup and view all the answers

How do sponges reproduce?

<p>Both by asexual and sexual methods</p> Signup and view all the answers

What is the general habitat of Porifera?

<p>Aquatic, mostly marine, except one family that lives in freshwater</p> Signup and view all the answers

What are the three main layers that make up the body of a sponge?

<p>Outer ectoderm, inner endoderm, and intermediate layer of mesenchyme</p> Signup and view all the answers

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