Cercomeromorpha, Neodermata, Platyhelminthes
T/F Roundworms do not perform indirect development(describe).
False, roundworms perfrom indirect development where fertilized egg -> larva
What kinds of muscles do roundworms have?
Where do filarial worms live?
Live in lymph passages
What causes elephantiasis and how is it spread? Describe disease as well.
Caused by filarial worms that block flow of lymph and cause disfiguring/swelling
of lower apendages. Spread by mosquitoes
What are trochophore?
Ciliated free swimming larva stage
What are veliger?
2nd free living larva stage
In what animals are veligers found?
Bivalves and most marine snails
Where in the ocean are trochophores and veligers found?
All over as they drift wide
Rank the top 3 most diverse animal phylums?
Arthropods 2. Mollusca 3. Chordata
Snails, slugs, clams, scallops, cuttlefish, octopuses, and squids belong to what
What environments are mollusks found in?
Mostly marine, some freshwater, some
In what shell are the anus and mantle cavity moved to the front?
What are nudibranchs?
How do nudibranchs obtain food?
T/F Terrestrial slugs have exposed gills.
False, nudibranchs have exposed gills
T/F Nudibranchs secr
Describe the dorsal plates of chitons?
They have 8 overlapping dorsal plates made of CaCO3
T/F Chitons have greatly reduced heads with small eyes and no tentacles.
False, chitons have greatly reduced heads but no eyes or tentacles.
T/F Most chitons are h
What is eutely? Example?
Adult has a fixed number of cells, C. elegans is a roundworm that has this.
What animal only has 959 cells?
How do hookworms obtain nutrients?
Parasite that sucks blood through intestinal wall
What worm produces anemia
What are nephrostome?
Open funnel lined with cilia in the nephridium.
What kind of heart system do most mollusks have?
3 chambered heart with blood vessels
What is mollusk blood called?
What kind of circulatory system do most mollusks have? Whi
How are shells made?
Secreted by outer surface of mantle
What encloses, supports, and protects the bodies of mollusks?
T/F The shell in mollusks are made of a layer of CaCo3.
False, they are made of 2 layers of CaCO3
What are radula?
Describe the coelom of mollusks?
Have a true coelom, reduced to small compartments around heart, excretory
organs, and parts of intestine.
What do clams use for locomotion?
T/F All mollusks have a differentiated head.
False, only some