Which of the following would not show the five characteristics typically found in animals?
A) Sponges, which have no true tissues but have two layers of cells that perform different functions.
B) Planaria, who have an incomplete digestive tract but do have muscles and excretory and reproductive systems.
C) Trypanosoma, a single celled organism that causes sleeping sickness in humans.
D) Leeches, segmented worms that are predatory on other animals.
E) Tapeworms, flatworms that infest the intestines of humans.
Correct Answer:
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Q42: Clams, snails, sea slugs, and octopuses belong
Q45: A closed circulatory system is found in
A)
Q46: Which are NOT among the phylum Mollusca?
A)clams
B)squids
C)lobsters
D)nautiluses
E)snails
Q48: A major characteristic of the arthropods is
Q52: The largest animal group, both in number
Q56: When an earthworm secretes a slime layer
Q61: Which pair exhibits the closest relationship?
A)spider-tick
B)housefly-mite
C)earthworm-grasshopper
D)crayfish-planarian
E)scorpion-clam
Q66: Which statement about arachnids is NOT true?
A)Ticks
Q66: An insect circulatory system is best described
Q80: The major insect body parts are
A) head,
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