BIO 182 Practical 2 ASU| 131 Questions | With Complete Solutions

Which animal has only two distinct tissue layers? correct answer: Hydra Which animal has a loose aggregate of cells in layers, but no real distinct tissue layers? correct answer: Sponge Which animal is an acoelomate? correct answer: Planarian Which animal is a pseudocoelomate? correct answer: Roundworm Which animal is parasitic and lives in the intestinal tract of other animals? correct answer: Roundworm True or False: The clam is eucoelomate correct answer: True Which animal's digestive system consists of intracellular digestion? correct answer: Sponge Which two animals have only one opening to their digestive system? correct answer: Hydra, Planarian True or False: The crayfish has two openings to its digestive tract and classifies it a "tube within a tube" correct answer: True Which animal's circulatory system uses water transported through the body of the animal? correct answer: Sponge Describe the circulatory system of the Hydra correct answer: The cells come in contact with water True or False: The planarian has no circulatory system correct answer: True What kind of circulatory system does the clam have? correct answer: Open; heart What kind of circulatory system do the clamworm and earthworm have? correct answer: Closed; blood vessels Does the Roundworm have a circulatory system? correct answer: No True or False: The circulatory system of the crayfish is open and consists of a heart, vessels, and sinuses correct answer: True Describe the circulatory system of the grasshopper correct answer: Open; heart, vessels, sinuses True or False: the sea star has a reduced circulatory system correct answer: True True or False: the lancelet has a closed circulatory system correct answer: True Is the circulatory system seen in the pig open or closed? correct answer: Closed Describe the respiratory organs of the sponge, hydra, and planarian correct answer: Gas exchange occurs directly across cell membranes