2. The large opening at the top of the sponge is called the

3. Which of the following is NOT what a sponge skeleton can be made of?

3. Which of the following is NOT what a sponge skeleton can be made of?

4. Choanocytes are also known as _____.

7. What are stinging organelles with a coiled thread found in the tentacles which are used to capture prey or defend against predators?

This picture of a sea anemone would represent which form of a Cnidarian?

Ctenophora is commonly called as:

The function of Flame cells are:

Cnidarians were the first animals to develop _____________ cells so they could react to their environment.

Which phylum first developed a mouth with a central digestive area due to the two cell layers, endoderm and ectoderm.

Platyhelminthes are best described as

Animal having a water canal system and spicules

Locomotory organs in Neries

Emission of light in aquatic animals

Hooks and suckers present in

Blood sucking leech

The parasite that cause elephantiasis

Circulatory system in cockroach is ------------

Chordates that have notochord in larval tail