Biology of Sponges and Cnidarians

A set of flashcards based on key concepts regarding the biology of sponges and cnidarians.

Spicules may be ___, ___, or ___.

calcareous, siliceous, proteinaceous.

The cells that trap food particles in a sponge are called ____.

Collar cells.

A _ is the feeding structure of the Obelia hydroid colony.

hydranth.

A ___ is the reproductive structure of the Obelia hydroid colony.

gonangium.

The stinging cells possessed by all cnidarians are called ____.

cnidocytes.

The gelatinous layer between the cell layers of Hydra is called ____.

mesoglea.

The free-floating life form of cnidarians is called ____.

Medusa.

The attached, sessile form of cnidarians is called ____.

Polyp.

Sponges belong to phylum ____.

Porifera.

Hydra and Obelia are in phylum ____.

Cnidaria.

Hydra exhibits what form

Polyp

What’s the arrow pointing at

Bell

What’s the arrow pointing at

Mouth

What’s the arrow pointing at

Tentacles

What’s the arrow pointing at

Bud

What’s the arrow pointing at

Tentacles

What’s the arrow pointing at

Body column

Gonangium