BIO 1500- Exam 4 Questions and
Answers 100% Pass
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. - ✔✔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 - ✔✔b. False
3. Which one of the following incorrectly matches a molluscan structure with its typical
function?
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,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 - ✔✔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 - ✔✔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 - ✔✔a. Contraction of the circular muscles
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, 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. - ✔✔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 - ✔✔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
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Answers 100% Pass
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. - ✔✔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 - ✔✔b. False
3. Which one of the following incorrectly matches a molluscan structure with its typical
function?
100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 1
,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 - ✔✔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 - ✔✔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 - ✔✔a. Contraction of the circular muscles
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, 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. - ✔✔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 - ✔✔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
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