Ch 33 Self Test

Which phylum has a water vascular system?

• molluscs

• echinoderms

• cnidarians

• annelids

• arthropods

Which would be a great surprise if found in the body of a
sponge?

• spongocoel

• osculum

• mesohyl

• limb

Which statement about molluscs would lose points on an exam?

• There are over 100,000 known species.

• They are the most diverse phylum.

• All molluscs have the similar body plan.

• Three-quarters of living species are gastropods.

• The phylum Mollusca has eight major clades.

Which statement about arthropods would lose points on an exam?

• Arthropods have an open circulatory system.

• Arthropods have well-developed sensory organs.

• Arthropod bodies are completely covered by a cuticle.

• Terrestrial arthropods have internal structures specialized for gas exchange.

• Most arthropod sensory organs are concentrated at the
  posterior end.

If these animal phyla had a cocktail party, which one would feel most unwelcome?

• Nematoda

• Arthropoda

• Mollusca

• Chordata

• Cnidaria

If you wanted to show an example of segmentation to a
group of visiting students, which phylum would be the best
choice?

• Nematoda

• Arthropoda

• Mollusca

• Chordata

• Cnidaria

If you wanted to obtain a large amount of nervous tissue with the least amount of dissection and processing, what phylum would you use for your sample?

• Nematoda

• Arthropoda

• Mollusca

• Chordata

• Cnidaria

A confused friend from your course has made a Halloween costume that is supposed to show one animal phylum. It has a hard outer shell and a water vascular system. You point out that the costume combines features of _____.

• Arthropoda and Echinodermata

• Echinodermata and Chordata

• Chordata and Cnidaria

• Platyhelminthes and Cnidaria

• Cnidaria and Porifera

If you discovered a new organism with 10 jointed legs, you would expect it to have _____.

• a water vascular system

• a closed circulatory system

• muscles attached to an exoskeleton

• a radula

The best example of an animal phylum with enhanced overall surface area is _____.

• Cnidaria

• Nematoda

• Annelida

• Platyhelminthes

• Echinodermata