Zoology Midterm Review

Front

What is the purpose of a dichotomous key?

Back

To identify organisms.

Front

What are small openings on the outside of the sponge called?

Back

Ostia.

Front

What does motile mean?

Back

An animal can move from one place to another.

Front

Cnidarians with the _____ body form have tentacles that point up.

Back

Polyp.

Front

Tigers, Jellyfish, Gorillas, and Sponges are all part of kingdom _______.

Back

Animalia.

Front

What is the primary characteristic of the kingdom Animalia?

Back

Organisms are multicellular, eukaryotic, and heterotrophic.

Front

What is the function of choanocytes in sponges?

Back

They help in feeding and water circulation.

Front

Define the term 'invertebrate'.

Back

An animal that lacks a backbone.

Front

What is the main difference between polyp and medusa forms in cnidarians?

Back

Polyp is sessile with tentacles pointing up, while medusa is free-swimming with tentacles pointing down.

Front

What is the role of the osculum in sponges?

Back

It is the large opening through which water exits the sponge.