BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 45, Problem 1U
Exoskeletons and endoskeletons differ in that
a. an exoskeleton is rigid, and an endoskeleton is flexible.
b. endoskeletons are found only in vertebrates.
c. exoskeletons are composed of calcium, and endoskeletons are built from chitin.
d. exoskeletons are external to the soft tissues, and endoskeletons are internal.
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What is the major disadvantage of an exoskeleton?
A) It does not provide effective support for muscles.
B) It does not protect the internal organs.
C) It hardens only after an extended exposure to air.
D) It must be periodically shed for growth to occur.
Which of the following is not a true statement comparing exoskeletons and endoskeletons? a. Endoskeletons can support larger organisms. b. Only endoskeletons can grow as an organism grows. c. Exoskeletons provide greater protection of the internal organs. d. Exoskeletons provide less mechanical leverage.
Exoskeletonsa. are typical of vertebrates.b. are hydrostatic.c. must be shed periodically.d. are moved by muscles attached to the outside of joints.
Chapter 45 Solutions
BIOLOGY
Ch. 45.1 - Compare hydrostatic skeletons, exoskeletons, and...Ch. 45.1 - Explain how animals with hydrostatic skeletons...Ch. 45.2 - Prob. 1LOCh. 45.2 - Prob. 2LOCh. 45.2 - Prob. 3LOCh. 45.3 - Prob. 1LOCh. 45.4 - Prob. 1LOCh. 45.4 - Prob. 2LOCh. 45.4 - Prob. 3LOCh. 45.5 - Prob. 1LO
Ch. 45.5 - Describe how friction and gravity affect...Ch. 45.5 - Prob. 3LOCh. 45 - Prob. 1IQCh. 45 - Exoskeletons and endoskeletons differ in that a....Ch. 45 - Worms use a hydrostatic skeleton to generate...Ch. 45 - Bone develops by one of two mechanisms depending...Ch. 45 - Which of the following statements best describes...Ch. 45 - Motor neurons stimulate muscle contraction via the...Ch. 45 - Prob. 6UCh. 45 - If you wanted to study the use of ATP during a...Ch. 45 - Place the following events in the correct order....Ch. 45 - You take X-rays of two individuals. Ray has been a...Ch. 45 - You have identified a calcium storage disease in...Ch. 45 - How do the muscles move your hand through space?...Ch. 45 - How can osteocytes remain alive within bone? a....Ch. 45 - Swimming underwater using forelimbs for propulsion...Ch. 45 - If a drug inhibits the release of ACh, what will...Ch. 45 - Prob. 1SCh. 45 - Prob. 2SCh. 45 - The nerve gas methylphosphonofluoridic acid...Ch. 45 - If natural selection favors the evolution of wings...
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- 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.arrow_forwardWhat is a unique characteristic of an endoskeleton as compared to an exoskeleton? a). The endoskeleton is capable of growth. b). The endoskeleton permits movement. c). The endoskeleton is molted more frequently.d). The endoskeleton provides support. e). Two of the choices are correct.arrow_forwardUnlike exoskeletons, endoskeletons do not provide protection for the body surface of animals. How can the lack of an external skeletonalso be an advantage for animals?arrow_forward
- Explain how an endoskeleton differs from an exoskeleton.arrow_forwardMost land animals with exoskeletons are smaller than the volume of a mouse, and most vertebrates are larger than a mouse (marine invertebrates can be somewhat bigger). What keeps an insect with an exoskeleton from being as big as a horse?arrow_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_forward
- Although the most diverse and numerous animal groups on Earth have exoskeletons, this type of skeleton has some disadvantages when compared to endoskeletons. Describe any two potential disadvantages of exoskeletons.arrow_forwardOf the 3 kinds of cells found in cartilage, which helps build cartilaginous tissue? Group of answer choices a. osteocytes b. chondroblasts c. osteoblasts d . chondroclasts Since cartilage is largely avascular, how do cartilaginous cells receive nutrients? Group of answer choices a. from nearby capillaries b. diffusion through the matrix c. from the canaliculi throughout d. from nearby nervous tissuearrow_forwardDescribe the exoskeleton and examples of organisms with this type of skeleton Which is the main component of the exoskeleton of arthropods?arrow_forward
- Compare the bat to the bird. Where is the bat's ulna? Are there any remnants of it? How is the bat's wing membrane supported by its skeleton? Be precise. Does a bird's wing work in the same way? How many metacarpals and digits ("fingers") does it have? (This is all just one question on comparing the bat to the bird)arrow_forwardWhich of the following is not a reason we become shorter as we age? a.As a person ages, the intervertebral discs become thinner and the vertebrae will be stacked closer together, resulting in shorter stature. b.As a person ages, vertebral bodies lose bone mass (osteoporosis) resulting in smaller vertebrae that stack closer together. c.As a person ages, scoliosis may develop resulting in an abnormal spinal curvature and shorter stature. d.As a person ages, the ligaments connecting vertebrae together are weakened, resulting in a more pronounced kyphosis. This posterior curvature of the spine lowers the skull, making you shorter.arrow_forwardCompare the structure and functions of different types of skeletal systems, including the hydrostatic skeleton, exoskeleton, and endoskeleton.arrow_forward
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