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;
25 Cards in this Set
- Front
- Back
Sponges belong to the phylum ______.
|
Porifera
|
|
Porifera means ______ in latin.
|
pore-bearer
|
|
What key property allowed sponges to be classified as animals instead of plants.
|
cell recognition
|
|
Sponges have ______ symmetry.
|
radial
|
|
tiny openings or pores through which water enters
|
ostia
|
|
large openings through which water exits
|
oscula
|
|
Sponges are ______ because they remain firmly attached to a submerged surface for their entire lifespan.
|
sessile
|
|
Sponges lack ______ which is present in all other animals.
|
true tissue
|
|
In terms of ceolum, sponges are ______.
|
aceolomate
|
|
Why aren't the cell layers of a sponge true tissue?
|
The cell layers are loose federations of cells that are relatively unspecialized.
|
|
Sponges are called ______ or ______ feeders because they collect food particles from water passed through some sort of food-trapping equiptment.
|
suspension; filter
|
|
Flexible protein called ______ makes up the skeletal fibers of amoebocytes.
|
spongin
|
|
specialized cells that move throughout the mesohyl, provide the rest of the sponge's cells with nutrients and carry away waste
|
amoebocytes
|
|
a layer of flagellated cells linining the internal cavity that trap food particles
|
choanocytes (collar cells)
|
|
a protist thought to be the ancestor of sponges
|
choanoflagellates
|
|
Most sponges live in ______ water.
|
marine
|
|
tiny needles of silica or calcium carbonate that make up the skeletons of most sponges
|
spicules
|
|
supporting structures are found throughout the ______.
|
mesohyl
|
|
______ sponges have spicules composed of calcium carbonate.
|
Calcareous
|
|
______ sponges and ______ have spicules made of silica.
|
glass; demosponges
|
|
Sponges can reproduce ______ by shedding fragments that develop into new individuals.
|
asexually
|
|
Sponges can reproduce asexually by ______.
|
budding
|
|
clusters of ameobocytes encased in protective coats produced by some freshwater sponges when living conditions become harsh
|
gemmules
|
|
Most sponges are ______ that reproduce sexually because eggs and sperm are produced at different times.
|
hermaphrodites
|
|
Fertilization occurs in the ______.
|
mesohyl
|