Hydra/Intro. to Cnidarians

In Cnidarians, where does digestion occur?

• spongocoel

• nematocyst

• gastrovascular cavity

• tentacles

A jellyfish is covered in an outer layer of cells called the epidermis. Within the epidermis is the ____________, which is the jelly-like interior of the animal.

• mesoglea

• gastrodermis

• epidermin

• tentacle

Name this body type.

• Medusa

• Polyp

Name this body type.

• Medusa

• Polyp

What type of asexual reproduction is shown here?

• Gemmules

• Fragmentation

• Budding

• Sexual reproduction

How are nervous responses in cnidarians controlled?

• by their gastrovascular cavity

• through the mesoglea

• by the nerve net

• through the filaments in their nematocysts

How do cnidarians reproduce?

• only sexually

• only asexually

• both sexually and asexually

• genetically reproduced in labs

What surrounds the mouth of Cnidarians?

• guard cells
• pinococytes
• tentacles
• spines

What type of cnidarian is pictured?

• Jellyfish

• hydra

• sea anemone

• coral

All animals in phylum Cnidaria demonstrate _____________.

• radial symmetry

• asymmetry

• bilateral symmetry

• pretty symmetry