Exam (elaborations)
USABO Biosystematics Exam Questions and Answers
- Course
- Institution
USABO Biosystematics Exam Questions and Answers
[Show more]
Content preview
USABO Biosystematics Exam Questionsand Answers
Calcarea, Silicea (sponges) - Answer -Lack true tissues; have choanocytes (collar cells-
flagellated cells that ingest bacteria and tiny food particles)
Cnidaria (hydras, jellies, sea anemones, corals) - Answer -Unique stinging structures
(nematocysts) housed in special cells (cnidocytes); diploblastic, radially symmetrical,
gastrovascular cavity
Plathyhelminthes - Answer -Dorsoventrally flattened, unsegmented acoelomates;
gastrovascular cavity or no digestive tract
Rotifera (rotifers) - Answer -Pseudocoelomates with alimentary canal (digestive tube
with mouth and anus); jaws (trophi) in pharynx; head with ciliated crown
Lophophorates: Ectoprocta, Brachipoda - Answer -Coelomates with lophophores
(feeding structures bearing ciliated tentacles)
Mollusca (clams, snails, squids) - Answer -Coielomates with three main body parts
(muscular foot, visceral mass, mantle); coelom reduced; most have hard shell made of
calcium carbonate
Annelida (segmented worms) - Answer -Coelomates with segmented body wall and
internal organs (except digestive tract, which is unsegmented)
Nematoda (roundworms) - Answer -Cylindrical, unsegmented pseudocoelomates with
tapered ends; no circulator system; undergo ecdysis
Arthopoda (crustaceans, insects, spiders) - Answer -Coelomates with segmented body,
jointed appendages, and exoskeleton made of protein and chitin
Echinodermata (sea stars, sea urchins) - Answer -Coelomates with bilaterally
symmetrical larvae and five-part body organiziation as adults; unique water vascular
system; endoskeleton
Chordata (lancelets, tunicates, vertebrates) - Answer -Coelomates with notochord;
dorsal, hollow nerve cord; pharyngeal slits; post-anal tail
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mereka. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73243 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now