Cnidaria Review

A hydra can thrive in freshwater environments which is unique for this class. 

Cnidarians exhibit _ symmetry which is a modification of radial symmetry. 

Cnidarians can best be described as __ organisms. 

advantage of radial symmetry in sedentary animals 

ingests the stinging cells of a Man-of-war and uses them as means of protection 

reproductive structure of a hydra

The flesh of the a coral is supported by the limestone skeleton that surrounds its body. 

All of the following can be used to describe the outer layer of a cnidarian except __. 

A loggerhead sea turtle is a common predator of the Man-of-War. A or D

which of the following is the barbed stinger that delivers the toxin of the cnidarian?

cause of alarming jellyfish reproduction cycles 

dioceous body form of cnidarians; usually free swimming 

has a single opening 

structure INSIDE the cnidocyte that distributes the toxin 

All cnidarians are protostomes and have one body opening.   A or D

the actual stinging cell of a cnidarian is called the ___

structure into which the mouth of cnidarians opens 

The solitary anthozoans are the sea anemones which live alone.   A or D 

point of attachment for a hydra 

to be __ means to live in salt water

contains (means) the mouth 

The food of a cnidarian is digested outside of the cells in the cardiovascular cavity.  A or D

Cnidarians are highly cephalized and have 3 cell layers.   A or D 

A jellyfish has the most lethal poison of all organisms in the animal kingdom. A or D

__ is the term used to describe the climate of the environment in which many cnidarians live. 

the larval stage of a jellyfish is called the __

the man-of-war fish and the man-of-war exhibit a ___ relationship 

opposite the mouth 

difference in biradial and bilaterally symmetrical animals

common name for the most dangerous box jelly