Exam Questions and CORRECT Answers
What is the flexible, longitudinal rod that is located between the digestive tract and the nerve
cord in all chordates called? - CORRECT ANSWER - notochord
The two distinguishing features of vertebrates are the presence of - CORRECT
ANSWER - skull and backbone
A biologist visited a fish market and found a fish she did not recognize. To place the unknown
fish into a major group correctly, she would need to look at - CORRECT ANSWER - the
structure and composition of the skeleton and the structure and arrangement of the fins
The difference between pseudocoelomates and animals with a true coelom is that
pseudocoelomates _____ whereas coelomates - CORRECT ANSWER - have a body
cavity partially lined with tissue derived from mesoderm have a body cavity completely lined
with tissue derived from mesoderm
Consider the following list of animals: giant squid, earthworm, fish, snail, tapeworm, coral, and
sea star. The two that belong to the same phylum are the _____, and their phylum is _____. -
CORRECT ANSWER - giant squid and snail; Mollusca
Which one of the following animals is most closely related to spiders? - CORRECT
ANSWER - scorpions
Kids sometimes pick up "bloodsuckers" in ponds, but these segmented animals typically spend
most of their time parasitizing turtles. Some are used medicinally to improve blood flow and
reduce inflammation near injuries in humans. They are _____. - CORRECT ANSWER -
leeches, annelid
Pikaia gracilens is an invertebrate animal described from the wonderful pre-Cambrian soft-
bodied fossils of the Burgess Shale in British Columbia. This species has a prominent notochord
, and segmental muscles. From this information, you could conclude that it is closely related to
_____. - CORRECT ANSWER - lancelets
most successful animal phylum? - CORRECT ANSWER - Arthopoda
A sea star and a sea jelly belong to the phyla _____ and _____, respectively. - CORRECT
ANSWER - Echinodermata, Cnidaria
Tapeworms are similar to fungi in that they? - CORRECT ANSWER - feed by absoprtion
The opossum is an example of a(n) _____ mammal. - CORRECT ANSWER - marsupial
Consider the following list of animals: giant squid, earthworm, fish, snail, tapeworm, coral, and
sea star. The two that belong to the same phylum are the _____, and their phylum is _____. -
CORRECT ANSWER - giant squid and snail, Mollusca
How many arms does a squid have? - CORRECT ANSWER -
At the Sand Bar, customers can nibble on snails (_____) with garlic butter and oysters on the half
shell (_____) during their "happy hour." The happy patrons will be enjoying what types of
molluscs? - CORRECT ANSWER - gastropods, bivalves
Flatworm up to 60 feet long that you get from undercooked beef? - CORRECT
ANSWER - tapeworms
Which lists in the correct order the three tissue layers in a typical animal, starting from inside the
digestive tract? - CORRECT ANSWER - endoderm-->mesoderm-->ectoderm
Phylum that includes segmented worms such as the polychaetes? - CORRECT ANSWER -
Annelida