BIO 1500 Exam 4 UPDATED Exam
Questions and CORRECT Answers
1. Centipedes:
a. have a hundred pairs of legs.
b. have venomous fangs.
c. are herbivores.
d. have two pair of legs per segment.
e. love to fetch sticks. - CORRECT ANSWER - b. have venomous fangs
2. The side to side thrashing of a nematode is accomplished by contraction of its circular
muscles.
a. True
b. False - CORRECT ANSWER - b. False
3. Which one of the following incorrectly matches a molluscan structure with its typical
function?
a. mantle—secretion of the shell (when present)
b. visceral mass—houses the gills and the exit openings of the excretory, reproductive &
digestive organs
c. foot—locomotion
d. nephrostome—collection of nitrogenous wastes
e. radula—feeding organ - CORRECT ANSWER - b. visceral mass—houses the gills and
the exit openings of the excretory, reproductive & digestive organs
4. Each segment of an annelid typically contains bristles of chitin called:
a. cilia.
b. parapodia.
c. chaetae.
, d. leglets.
e. hyphae - CORRECT ANSWER - c. chaetae
5. How would an earthworm stretch its body to reach a patch of dirt after crossing a hot
sidewalk?
a. Contraction of the circular muscles
b. Contraction of the longitudinal muscles - CORRECT ANSWER - a. Contraction of the
circular muscles
6. In terms of numbers of species, the most successful phylum on the planet is the:
a. Mollusca.
b. Arthropoda.
c. Echinodermata.
d. Annelida.
e. Chordata. - CORRECT ANSWER - b. Arthropoda
7. All fish have internal gills and a single-loop blood circulation, but not all fish have jaws and a
complete vertebral column.
a. True
b. False - CORRECT ANSWER - a. True
8. When a tourist buys a sand dollar, which is an echinoid, at a beach shop, what are they
buying?
a. A calcium carbonate shell secreted from the mantle
b. An endoskeleton of calcium carbonate ossicles
c. A molted exoskeleton made of chitin
d. An endoskeleton made of bone
e. An endoskeleton made of cartilage - CORRECT ANSWER - b. An endoskeleton of
calcium carbonate ossicles
Questions and CORRECT Answers
1. Centipedes:
a. have a hundred pairs of legs.
b. have venomous fangs.
c. are herbivores.
d. have two pair of legs per segment.
e. love to fetch sticks. - CORRECT ANSWER - b. have venomous fangs
2. The side to side thrashing of a nematode is accomplished by contraction of its circular
muscles.
a. True
b. False - CORRECT ANSWER - b. False
3. Which one of the following incorrectly matches a molluscan structure with its typical
function?
a. mantle—secretion of the shell (when present)
b. visceral mass—houses the gills and the exit openings of the excretory, reproductive &
digestive organs
c. foot—locomotion
d. nephrostome—collection of nitrogenous wastes
e. radula—feeding organ - CORRECT ANSWER - b. visceral mass—houses the gills and
the exit openings of the excretory, reproductive & digestive organs
4. Each segment of an annelid typically contains bristles of chitin called:
a. cilia.
b. parapodia.
c. chaetae.
, d. leglets.
e. hyphae - CORRECT ANSWER - c. chaetae
5. How would an earthworm stretch its body to reach a patch of dirt after crossing a hot
sidewalk?
a. Contraction of the circular muscles
b. Contraction of the longitudinal muscles - CORRECT ANSWER - a. Contraction of the
circular muscles
6. In terms of numbers of species, the most successful phylum on the planet is the:
a. Mollusca.
b. Arthropoda.
c. Echinodermata.
d. Annelida.
e. Chordata. - CORRECT ANSWER - b. Arthropoda
7. All fish have internal gills and a single-loop blood circulation, but not all fish have jaws and a
complete vertebral column.
a. True
b. False - CORRECT ANSWER - a. True
8. When a tourist buys a sand dollar, which is an echinoid, at a beach shop, what are they
buying?
a. A calcium carbonate shell secreted from the mantle
b. An endoskeleton of calcium carbonate ossicles
c. A molted exoskeleton made of chitin
d. An endoskeleton made of bone
e. An endoskeleton made of cartilage - CORRECT ANSWER - b. An endoskeleton of
calcium carbonate ossicles
