Sponges and Cnidaria

What is an invertebrate?

• An animal with a backbone
• a mammal
• An animal without a backbone
• birds

This picture is an example of which group of invertebrates?

• Segmented worms
• Fish
• Sponges
• Arthropods

Between 90-95% of all animals on earth can be classified as _____.

• invertebrates
• vertebrates
• reptiles
• mammals

I have a digestive cavity with one opening, and have tentacles.  I am a hydra.

• Echinoderm
• Cnidarian
• Arthropod
• Mollusk

Which phylum is mainly asymmetrical?

• cnidaria
• porifera (sponges)
• echinodermata
• arthropoda

These organisms all have nematocysts.

• cnidaria
• mollusca
• arthropoda
• porifera

Cnidarians have what kind of symmetry?

• Radial
• Bilateral
• Asymmetrical

Nematocysts (stinging cells) are used for...

• Defense
• Catch organisms for food
• Both of these

Sponges are members of the ________ Kingdom.

• Animal
• Larva
• Porifera
• Sessile

What surrounds the mouth of Cnidarians?

• guard cells
• pinococytes
• tentacles
• spines