Porifera and Cnidaria

Front

About how many species of sponges are there?

Back

There are approximately 5000-10,000 species of sponges.

Front

How fast do cnidarians hit their prey once they are triggered?

Back

Cnidarians can hit their prey in about 3/1000ths of a second.

Front

These types of cells in a sponge are also called collar cells:

Back

Choanocytes are the cells in a sponge also known as collar cells.

Front

The word 'Porifera' means:

Back

The term 'Porifera' means 'pore bearing'.

Front

These hard particles of calcium or silicon dioxide make up the internal skeleton of a sponge:

Back

Spicules are the hard particles that make up the internal skeleton of a sponge.

Front

What is the primary function of choanocytes in sponges?

Back

Choanocytes help in filtering water and capturing food particles.

Front

What type of symmetry do cnidarians exhibit?

Back

Cnidarians exhibit radial symmetry.

Front

What are nematocysts?

Back

Nematocysts are specialized cells in cnidarians that contain stinging structures used for capturing prey.

Front

What is the main body structure of sponges?

Back

The main body structure of sponges is a porous body with a central cavity called the spongocoel.

Front

How do sponges reproduce?

Back

Sponges can reproduce both sexually and asexually.