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Cell Origins
Sponges
More Sponges
You guessed it... Sponges
SPONGES
100
The theory that describes the origin of complex eukaryotic cells.
What is endosymbiosis?
100
Name two characteristics of CLASS CALCEREA
What is most primitive, live in shallow water, marine, small, 2-4 pointed spicules made of calcium carbonate?
100
Name six characteristics of sponges
What are: multicellular, aquatic, pore-bearing, asymmetrical, sexual/asexual reproduction, non-motile, lack tissue, spicules?
100
These are the three main forms of sponges.
What are asconoid, synconoid and leuconoid?
100
This means "the SIDE animals"
What is Parazoan?
200
Name two advantages of multicellularity
What are: cell specialization (except sponges), larger size?
200
Name two characteristics of CLASS HEXACTINELIDA
What is 6-pointed spicules, spicules made of silica, glass sponges, perpendicular rays, found in cold and deep waters, can form reefs, non-motile?
200
The excurrent pore where water exits.
What is the osculum?
200
This is the type of reproduction a sponge utilizes
What is asexual and sexual?
200
Name three classes of sponges.
What are: Calcarea, Hexantinelida and Demonspongia?
300
Name a DISadvantage of multicellularity
What is poor surface area to volume ratio?
300
Name two characteristics of demonspongia.
What is most abundant group, vary in size, spicules have 1-4 points, freshwater and marine forms, spicules made of calcium carbonate?
300
creates the current and provides the feeding
What is choanocytes?
300
These form when the sponge dies from the environment and waits for the environment to get better
What are gemmules?
300
The pinacocytes are the cells that make up this layer of the sponge.
What is the outer layer?
400
Name two pieces of evidence for the Theory of Endosymbiosis.
What are: similar in size to prokaryotes, DNA is similar in organelles and the formation of multiple membrane layers?
400
A system that moves water through a sponge for feeding and breathing using collar cells or choanocytes describes this.
What is the aquiferous system?
400
The skeletal element that provides structure
What are the spicules?
400
Name the Phylum of Sponges!
What is porifera?
400
This is a type of cell that can transform into any type of cell necessary in a sponge.
What is the amoebocyte?
500
This describes the process of engulfment of molecules into a cell.
What is endocytosis?
500
the pore that allows circulation of fluids between adjacent body sections
What is the ostium?
500
Also known as the spongocoel, this is the open cavity of a sponge.
What is the atrium?
500
The number of extant or living sponges.
What is 9000?
500
These are the external, miniature life preserving device
What are buds?