BIOLOGY:DYNAMIC SCIENCE-ACCESS >CUSTOM<
4th Edition
ISBN: 9781337254175
Author: Russell
Publisher: CENGAGE C
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Chapter 43, Problem 7TYK
Which of the following is not an example of a hydrostatic skeletal structure?
a. the tube feet of sea urchins
b. the body wall of annelids
c. the mantle of squids
d. the body wall of cnidarians
e. the penis of mammals
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Exoskeletonsa. are typical of vertebrates.b. are hydrostatic.c. must be shed periodically.d. are moved by muscles attached to the outside of joints.
why do you think hydrostatic skeleton is eventually lost in animals with exoskeleton and endoskeleton? give 2 examples with scientific explanation
Worms 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.
Chapter 43 Solutions
BIOLOGY:DYNAMIC SCIENCE-ACCESS >CUSTOM<
Ch. 43.1 - Prob. 1SBCh. 43.1 - Prob. 2SBCh. 43.1 - Prob. 3SBCh. 43.2 - Prob. 1SBCh. 43.2 - Prob. 2SBCh. 43.3 - Prob. 1SBCh. 43.3 - Prob. 2SBCh. 43 - Prob. 1TYKCh. 43 - Prob. 2TYKCh. 43 - Prob. 3TYK
Ch. 43 - Prob. 4TYKCh. 43 - Prob. 5TYKCh. 43 - Prob. 6TYKCh. 43 - Which of the following is not an example of a...Ch. 43 - Endoskeletons: a. protect internal organs and...Ch. 43 - Prob. 9TYKCh. 43 - Prob. 10TYKCh. 43 - Prob. 11TYKCh. 43 - Prob. 12TYKCh. 43 - Prob. 13TYKCh. 43 - Prob. 14TYKCh. 43 - Prob. 15TYKCh. 43 - Prob. 1ITDCh. 43 - Prob. 2ITDCh. 43 - Prob. 3ITDCh. 43 - Prob. 4ITD
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- Endoskeletons: a. protect internal organs and provide structures against which the force of muscle contraction can work. b. differ from exoskeletons in that endoskeletons do not support the external body. c. cannot be found in echinoderms. d. are composed of cartilaginous structures that form the skull. e. compose the arms and legs.arrow_forwardOne feature that amphibians and humans have in common is(A) the number of heart chambers.(B) a complete separation of circuits for circulation.(C) the number of circuits for circulation.(D) a low blood pressure in the systemic circuitarrow_forwardHow does the arrangement of skeletal structures differ in sea urchins, sea stars, and brittle stars? How do these differences establish the way these animals move? How is the skeleton of a sea urchin like the skeleton of a lobster? How is it different? Sea stars have no teeth, yet they eat other animals (corals, molluscs). How do they do this?arrow_forward
- A marine biologist catches a species of fish she has never seen before. Upon examination, she determines that the species has a predominantly cartilaginous skeleton and a swim bladder. If its pectoral fins are not fused with its head, to which category of fish does the specimen belong? a. Rays b. Osteichthyes c. Sharks d. Hagfisharrow_forwardwhy do you think hydrostatic skeleton is eventually lost in animals with exoskeleton and endoskeleton? give 2 examples and scientific explanation please do not just copy from google and this site, i need other answersarrow_forwardA human's arm, a cat's front leg, a dolphin's front flipper, and a bat's wing _____ a. are used in similar ways b. have similar kinds of bones c. share many similarities with insect wings and jellyfish tentacles d. have nothing in commonarrow_forward
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