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Chapter 28: Q. 23 (page 776)
The sister taxon of the Chordata is the _____.
a. Mollusca
b. Arthropoda
c. Ambulacraria
d. Rotifera
Option c is the correct answer.
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The embryonic development in nematodes can have up to __________ larval stages.
a. one
b. two
c. three
d. four
The rhynchocoel is a ________.
a. circulatory system
b. fluid-filled cavity
c. primitive excretory system
d. proboscis
Describe the feeding mechanism of sponges and identify how it is different from other animals
Which of the following statements is false?
a. Choanocytes have flagella that propel water through the body.
b. Pinacocytes can transform into any cell type.
c. Lophocytes secrete collagen.
d. Porocytes control the flow of water through pores in the sponge body
Which of the following statements about the anatomy of a mollusk is false?
a. Mollusks have a radula for grinding food.
b. A digestive gland is connected to the stomach.
c. The tissue beneath the shell is called the mantle.
d. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.
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