| A | B |
|---|
What is the scientific name of the "stinging cell" phylum?, 
| Cnidaria,
|
| What type of symmetry do all cnidarians have?,
| radial symmetry,
|
| What type of cells are located on the tentacles of cnidarians?,
| stinging cells (cnidocytes),
|
| What are the stingers inside stinging cells called? | nematocysts,
|
| What is the structure on the cnidocyte called that causes the cnidocyte to fire its nematocyst?,
| trigger |
| Where are the stinging cells of cnidarians located?,
| on the tentacles,
|
| How many openings are there in the body of a cnidarian?,
| 1 (the one opening serves to take in food and get rid of waste) |
| What are the two main stages in the cnidarian lifecycle called?,
| medusa and polyp,
|
| Which stage in the cnidarian lifecycle is sessile? | the polyp stage,
|
| Which stage in the cnidarian lifecycle is free swimming?,
| the medusa stage,
|
| What are the three characteristics that cnidarians have in common with all animals (and not all the other kingdoms)?,
| multicellular consumers without cell walls,
|
| Name a common freshwater cnidarian.,
| hydra,
|
| Which type of cnidarians build up reef systems?,
| corals |
| What are two types of corals?,
| Hard coral and soft coral |
| What is an example of a hard coral?,
| Brain coral |
| What is an example of a soft coral?,
| Sea Fan |
| How many tissue layers do cnidarians have?,
| 2 (endoderm and ectoderm) |
| What are the names of the tissue layers in cnidarians?,
| endoderm and ectoderm,
|
| What protects cnidarians from getting infections?,
| The mucous layer on the outside |
| Where do cnidarians digest their food?,
| Inside their sac-like body cavity (a.k.a. gastrovascular cavity),
|
| Give three examples of dangerous cnidarians.,
| Portugese Man-o-War, Box jellyfish, Fire coral |
| When does a cnidarian have bilateral symmetry?,
| When it is a newly fertilized egg called a planula. The planula can swim around using cilia until it finds a good spot to settle down and develop into the polyp stage of its lifecycle.,
|
| What does it mean to be monoecious?,
| You have both male and female sex organs. |
| What's another word for monoecious?,
| hermaphrodite,
|
| What does it mean to be dioecious?,
| You are either male or female but not both |
| Do cnidarians have a nervous system or a brain?,
| They have a simple nervous system with nerves that look like a net running through their body but they do not have a brain. |
| What is the name of the single-celled organisms that live in the tissues of many cnidarians?,
| Zooxanthellae,
|
| What type of symbiotic relationship does coral have with zooxanthellae?,
| mutualism (the coral gets food from the plant-like protist and oxygen while the zooxanthellae get carbon dioxide, fertilizer, and protection from the coral),
|
| What type of cnidarian does the clown fish have a symbiotic relationship with?,
| Sea anemone,
|
| What are three types of coral reef systems?,
| Fringing, barrier and atolls,
|
| Which type of reef is located close to the beach? | fringing reef,
|
| Which type of reef forms a circular lagoon out in the middle of the ocean/ | atoll,
|
| Which type of reef is located a few miles from shore and keeps large waves from breaking on the beach? | barrier reef |
| What are hard coral skeletons made of?,
| calcium carbonate,
|
| Where are coral reefs located in the world?,
| close to the equator |
| (True or false) Corals tend to grow in water that has a lot of nutrients.,
| False: Corals need clear nutrient poor water to grow so that sunlight can penetrate the water. If the water was nutrient rich, there would be a lot of algae and plankton in the water,
|
Which stage of the cnidarian lifecycle is this animal in?,  ,
| polyp stage, ,
|
Which stage of the cnidarian lifecycle is this animal in?,  ,
| medusa stage, ,
|
What is the name of this freshwater cnidarian?,  ,
| hydra, ,
|
What is the name of this cnidarian and the fish that lives amongst its tentacles?,  ,
| sea anemone and clown fish, ,
|
What is the name of this coral and what type of coral is it?,  ,
| Brain coral (a hard coral), |
What is the name of this coral and what type of coral is it?,  | Sea fan (a soft coral), |
What is happening to this coral that is all white?,  ,
| The coral is dying. The process is called bleaching., |
What type of coral reef is pictured here?,  ,
| Atoll, ,
|
What type of coral reef is pictured offshore to the bottom right of this aerial photo?,  ,
| Barrier reef, |
What type of coral reef is pictured here?,  ,
| Fringing reef, ,
|
