Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 31, Problem 2TYK
What is the function of the arthropod exoskeleton?
a. The presence of an exoskeleton has given arthropods a good fossil record, because hard parts fossilize more readily than do soft tissues.
b. It has no well-established function. (Trilobites had an exoskeleton, and they went extinct.)
c. It provides protection and functions in locomotion.
d. It makes growth by molting possible.
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Biological Science (7th Edition)
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- Which characteristic(s) account(s) for the success of arthropods? a. jointed appendages b. segmentation c. an exoskeleton d. All of the above are correct.arrow_forwardWhat is a key characteristic of all arthropods?a. Six legsb. Pseudocoelomc. Mandiblesd. Exoskeletonarrow_forwardWorms use a hydrostatic skeleton to generate movement. How do they do this? a. Their bones are filled with water, which provides the weight of the skeleton. b. The change in body structure is caused by contraction of muscles compressing the watery body fluid. c. The muscles contain water vacuoles, which, when filled, provide a rigid internal structure. d. The term hydrostatic simply refers to moist environment. They generate movement just as arthropods do.arrow_forward
- Which of the following classes of arthropod possess chelicerae? a. Chilopoda b. Crustacea c. Hexapoda d. Chelicerataarrow_forwardSuppose you find an animal that has a lateral line and a skeleton made out of cartilage. What class would you put it in? Group of answer choices A. Reptilia B. Amphibia C. Chondrichthyes D. Osteichthyes E. Mammaliaarrow_forwardWhich of the following statements about bilaterian animals is false? A. Many bilaterians are invertebrates but some are not. B. All bilaterians are triploblastic (have three germ layers). C. All bilaterians have bilateral symmetry. D. Most bilaterians have tissues but some do not.arrow_forward
- What is one trait related to locomotion that Au. sediba shares with modern humans? A. Angled femurs B. Longer arms and shorter legs C. Long and thin pelvis D. A divergent big toe (big toe sticks out)arrow_forwardWhich statement comparing these organisms is correct? O A. Both animals have a skeleton. O B. Both animals have an exoskeleton. C. The crab has a skeleton, and the human has an exoskeleton. D. The crab has an exoskeleton, and the human has a skeleton.arrow_forwardWhich of the following structures is not a component of the watervascular system of an echinoderm? a. Ossicles b. Ampullae c. Radial canals d. Madreporitesarrow_forward
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