ZooLAUogy - Fall Sem Pt 3 -Platyhelminthes,Nematoda,Mollusca

Phylum Platyhelminthes include all of the following EXCEPT:

• Planaria

• Flukes

• Roundworms

• Tapeworms

The body organization of both Platyhelminthes and Nematodes is

• Monoblastic

• Diploblastic

• Triploblastic

Phylum Platyhelminthes do not have a coelom of any kind, which means that they are considered

• Coelomates

• Pseudocoelomates

• Acoelomates

Both Platyhelminthes and Nematodes are considered

• Parasites

• Hookworms

• Tapeworms

• Radially symmetric

Phylum Nematoda are the first to develop a simple body cavity, and they are considered

• coelomates

• pseudocoelomates

• acoelomates

• #50firstdates

Phylum Mollusca are the first species that are considered

• Bilaterally symmetric

• pseudocoelomates

• coelomates

• postmates

Platyhelminthes reproduce asexually through

• budding

• mitosis

• meiosis

• fragmentation

Eyespots in Platyhelminthes are

• Specialized cells that function for excretion like a kidney

• Primitive eyes that allow the presence and intensity of light to be determined

• Dark concentrations of pigment that result from exposure to sunlight

Auricles in Platyhelminthes are

• A concentration of nerve cells

• The ears of Platyhelminthes

• The old woman in the Matrix who tells Neo that he is not the one

Ecological roles Platyhelminthes play include all of the following EXCEPT:

• parasites

• food source for other organisms

• decomposers of dead animals

• filtering contaminated water