Body Structures
Life Functions I
Life Functions II
Ecological Importance
Body Structures II
100
This body form is motile.
What is a medusa?
100
This part of a cnidarian is where food is digested.
What is the gastrovascular cavity?
100
Cnidarians move by this mechanism.
What is jet propulsion?
100
These cnidarians can take hundreds of years to grow only a little bit in structure.
What are corals?
100
Cnidarians have these structures surrounding the mouth.
What are tentacles?
200
This structure consists of a barb and thread that deliver the cnidarian's sting.
What is a nematocyst?
200
When an animal can move it is said to be ____.
What is "motile"?
200
This is an animal that has both male and female reproductive organs.
What is a hermaphrodite?
200
This cnidarian is well-known for having symbiotic relationships with clownfish.
What is an anemone?
200
Cnidarians have this thin outer layer.
What is an epidermis?
300
These cells provide a defense mechanism for the cnidarian and have a touch-sensitive trigger.
What are cnidocytes?
300
This basic collection of nerve cells makes up the nervous system of cnidarians.
What is a nerve net?
300
Some cnidarians have symbiotic relationships with these microorganisms.
What are zooxanthellae?
300
This kind of relationship is one where both members gain from it.
What is a symbiotic relationship?
300
We can describe a digestive system with only one opening as a ___________.
What is a "blind gut"?
400
Cnidarians have developed this kind of symmetry in their body designs.
What is radial symmetry?
400
These words can be used to characterize the life cycle of a cnidarian.
What is an "alternation of generations"?
400
Cnidarians depend on this process for much of their internal transport and respiration.
What is diffusion?
400
These cnidarians are food for animals like sea turtles.
What are jellies?
400
Corals and anemones have this body structure for most of their life cycles.
What is a polyp?
500
This material lies between the gastroderm and the epidermis.
What is the mesoglea?
500
Fertilization occurs in this part of the cnidarian.
What is the gastrovascular cavity?
500
The cnidarian uses these structures to detect light.
What are ocelli?
500
This is what happens when corals die because they release their zooxanthellae.
What is coral bleaching?
500
These structures help the cnidarian determine which way gravity is pulling, and therefore its orientation.
What are statocysts?
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