Short answer questions for Zoology Exam #3
Pseudocoelomates
1. Describe the characteristics of the pseudocoelomates and the
evolutionary advantages of a pseudocoel.
2. Describe the characteristics of the Phylum Rotifera and Phylum
Nematoda.
3. Describe the life cycle of
Ascaris Lumbricoides
pinworms
Trichinella spiralis
Filarial Worms (Wuchereria bancrofti).
Molluscs
1. Describe the two hypothesis that explains the development of the
coelom and which would best fit the Flatworm as its predecessor.
2. Describe the characteristics of the Phylum Mollusca and components of
its 3-part body plan.
3. Describe the general characteristics of the class Gastropoda, and
compare it to the class Bivalvia.
4. Descrbe the characteristics of the class Cephalopoda and its interesting
copulation (reproductive) process.
Annelids
1. Describe the characteristics of the Phylum Annelida and the advantages
of metamerism and tagmatization. And describe the characteristics of
the Class Polychaeta and explain the gas exchange and circulation.
2. Describe the characteristics of the Class Clitellata and describe the
reproductive structures and copulation, also describe the Subclass
Oligochaeta and Hirudinea and there benefits.
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Key Terms
Pseudocoelomate- Aschelminthes
Triploblastic, Aschelminthes, corona, cuticle, elephantiasis, eutely,
pseudocoel, cuticle, mastax, , molting, ecdysis, ecdysozoa, lophotrochozoa,
Pseudocoelomate, protonephridia, Phylum Rotifera, head, trunk, foot,
proboscis, renettes, genital pore, Nematoda, ascaris lumbricoides,
roundworm, pinworm, enterobius vermicularis, trichinella spiralis, porkworm,
trichinosis, Filarial worm, elephantiasis, lymphatic system, Hookworm, Necaor
americanus
Molluscan
Aceolomate, flatworm, triploblastic, schizocoel hypothesis, protostome,
enterocoel hypothosis, diploblastic, Molluscan, head-foot, visceral mass,
mantle, mantle cavity, radula, gills, operculum, statocysts, osphradia,
nephridium, pericardial cavity, trochophore larva, veligar larva, Class
Gastropoda, Torsion, proboscis, siphon, open circulatory system, hydraulic
skeleton, Class Bivalvia, umbo, incurrent opening, excurrent opening, anterior
end, posterior end, Class Cephalopoda, closed circulatory sytems,
hectocotylus, Class Polyplacophora, Class Scaphopoda,
Annelida
Annelid, metamerism,tagmatization, schizocoelous coelom formation,
protostomium, peristomium, parapodia, cuticle, setae, chaetae, closed
circulatory system, ganglia, metanephridium, nephridia, clitellum, annuli,
pharynx, crop, gizzard, seminal receptacle, ventral nerve, ganglion, Class
Polychaeta, Class Clitella, Subclass Oligochaeta, Subclass Hirudinea
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