Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
What are the five classes of cnidarians and their identifying characteristics? |
Anthozoa: Corals, Sea anemones Cubozoa: Box jellyfish Hydrozoa: Portuguese man-o-war, Hydra Scyphozoa: Well-known Jellyfish Staurazoa: Star jellyfish |
|
|
What phylum do sea sponges belong to? |
Porifera |
|
|
What is a choanocyte, what is it for? |
Cells that are located on the whip-like appendages, called flagella, located in the sponge. They line the interior of asconoid, syconoid andleuconoid body type sponges that contain a centra flagellum, or undulipodia, surrounded by a collar of microvilli which are connected by a thin membrane. |
|
|
What is a spicule? What is for? Where are they made? |
Are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin. Spongin skeletons were and are used as scrubbers in bathtubs. |
|
|
What 3 cell types make up a sponge? |
Choanocytes Flagellated cells Microvilli |
|
|
What phylum are sea walnuts a member of? |
Mnemiopsis |
|
|
What are the comb rows in ctenophora for? |
It releases their eggs and sperm into the water so it can be fertilized |
|
|
What is the life cycle of a cnidarian? |
They have a life cycle of two forms. One is a feee-swimming jellyfish medusa stage and the second id an attached poly stage. |
|
|
What is a planula? |
A free-swimming coelenterate larva with a flattened, ciliated, solid body. |
|
|
What is a nematocyst? Cnidocyst? |
A cnidocyst fired a structure that contains the toxin, from a characteristic sub cellular organelle called a cnidocyst. Nematocyst are also called the "stinging organ" |
|
|
Are cnidarians sexual or asexual, explain? |
Not all cnidarians reproduce sexually, with many species having complex life cycles of asexual polyp stages and sexual medusa. Some, however, omit either the polyp or the medusa stage. |
|
|
Differences in gastrodermis/epidermis. |
The Gastrodermis refers to the inner layer of cells lining the gastrovascular cavity of Cnidarians and the epidermis refers to the outer layer of skin |
|
|
Sketch a simple drawing and identify the structures of Aurelia. |
|
|
|
Sketch a simple drawing and identify the structures of a sponge. |
|
