Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

cnidaria

QuestionAnswer
Question Answer
What is the Phylum name for cnidarians? Cnidaria
What is the primary symmetry of cnidarians? Radial symmetry
How many germ layers do cnidarians have? Two (ectoderm and endoderm)
What type of digestive system do cnidarians have? Gastrovascular cavity (incomplete digestive system)
What is the function of cnidocytes? They contain nematocysts used for capturing prey and defense.
What are the two basic body forms of cnidarians? Polyp and medusa
Which cnidarians exhibit only the polyp body plan? Class Anthozoa (sea anemones, corals, sea pens)
What are the general characteristics of cnidarians? True tissue organization, radial symmetry, gastrovascular cavity, cnidocytes with nematocysts
What type of skeleton do cnidarians have? Some have a hydrostatic skeleton, others have a true skeleton (e.g., corals with calcium carbonate).
What is the body structure of a polyp? Sessile, tubular body, mouth surrounded by tentacles, leads to the gastrovascular cavity.
What is the body structure of a medusa? Free-swimming, umbrella-shaped, mouth on the concave side.
What is polymorphism in cnidarians? Having two body forms during the life cycle (polyp and medusa).
What are the four major classes of cnidarians? Anthozoa, Hydrozoa, Cubozoa, Scyphozoa
How do cnidarians feed? They prey on various organisms using their tentacles and nematocysts.
Where does digestion occur in cnidarians? Starts extracellularly in the gastrovascular cavity, then intracellular digestion occurs in nutritive-muscular cells.
How do cnidarians expel waste? Undigested particles are expelled through the mouth along with water.
What is a hydranth? A feeding zooid of a hydroid colony.
What is a gonangium? A reproductive member of a hydrozoan colony that produces medusa buds.
How do cnidarians reproduce asexually? Budding, fission, or fragmentation.
How do cnidarians reproduce sexually? By producing gametes; fertilization leads to planula larvae.
What are examples of organisms in Class Anthozoa? Sea anemones, corals, sea pens.
How do anthozoans reproduce? Asexually (budding, fragmentation) and sexually (gamete production).
Which cnidarian class includes hydroids and the Portuguese Man O' War? Class Hydrozoa
What is the organization of an Obelia colony? Polyp colony with digestive hydranths and reproductive gonangia; medusa reproduce sexually.
What is the function of a gonotheca? Protective covering of the gonangium.
What are gastrozooids? Feeding polyps with mouths and digestive organs.
What are gonozooids? Reproductive individuals that produce gametes.
What are medusa buds? They develop as gonozooids or into medusa.
Which class of cnidarians includes box jellies? Class Cubozoa
What makes Class Cubozoa unique? They have a box-shaped medusa and are the most venomous cnidarians.
Which class of cnidarians includes "true" jellyfish? Class Scyphozoa
What is the reproductive process of Scyphozoa? Dioecious, external fertilization leads to planula larvae, which settle as scyphistoma (polyp).
What is coral bleaching? Loss of symbiotic algae in corals, leading to coral death.
What are the causes of coral bleaching? Temperature stress, pollution, ocean acidification, and climate change.
What are the impacts of coral bleaching on coral reefs? Loss of biodiversity, destruction of marine habitats, and weakened reef structures.
Created by: user-1909129
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards