Cnidaria and Ctenophora

To which Class does the Portuguese Man-of-War belong?

• Anthozoa

• Hydrozoa

• Scyphozoa

• Cubozoa

What two traits make Cnidarians more complex than sponges?

• Ability to reproduce both sexually and asexually

• Ability to move and having a nervous system

• Ability to move and reproduce sexually

• Ability to produce ciliated larvae and digest food intracellularly

Immature, eight-armed, free-swimming medusae called ephyrae are formed by

• strobilation

• budding

• gemmulation

• meiosis

Which of the following are shared by all Cnidarians?

• two germ layers

• complex eyes that form images

• medusa form

• blind gut

• radial symmetry

Which body form is exhibited by the organism in this picture?

• polyp

• medusa

• leuconoid

• asconoid

Cnidarians reproduce by which of the following methods?

• fission

• strobilation

• budding

• internal fertilization

• external fertilization

What is the nervous system of a Cnidarian called?

• central nervous system

• nerve net

• integrated nervous system

• mixed nervous system

How are nutrients and carbon dioxide and oxygen transported in the body of Cnidarians since they don't have a heart or lungs?

• the tentacles perform circulation

• the ocelli perform circulation

• the gastrovascular cavity performs circulation

• the cnidocytes perform circulation

Where does intracellular respiration occur?

• in the gastrovascular cavity

• in the mesoglea

• in the choanocytes

• in the gastrodermis

Which Class includes true jellyfish?

• anthozoa

• scyphozoa

• hydrozoa

• cubozoa