Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 47.3, Problem 1R
Summary Introduction
To review:
The reason behind molting being a general phenomenon in arthropods and not in vertebrates.
Introduction:
Molting is the process, by which the animal sheds its part of a body, usually the outer layer. It is a very common practice in sea animals like soft-shelled crabs and all arthropods. The arthropods contain exoskeleton; hence, their growth is accommodated by molting.
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Life: The Science of Biology
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- How do nephridia of annelids compare to the flame ceels of flatworms and the nephridia of brachiopods?arrow_forwardHow does segmentation and having a fluid-filled body cavity confer certain advantages to annelids over the other worm phyla such as flatworms and nematodes?arrow_forwardCrustaceans, like annelids, are segmented animals. But crustaceans unlike annelids have tagmata. What are two advantages and two disadvantages to this type of segmentation in comparison to annelids?arrow_forward
- Segmentation in the earthworm is not exemplified bya. body rings.b. coelom divided by septae.c. setae on most segments.d. nephridia interior in most segments.e. tympanum exterior to segments.arrow_forwardThe protrusible rasping organ in a mollusk's mouth that is used to scrape food from the substrate is composed of nacre. a visceral mass. an ammonite. a veliger. a radula.arrow_forwardDescribe the life cycle of freshwater eels. How does the life cycle of American eels differ from that of European eels?arrow_forward
- Explain how coelenterates defend themselves when swimmers venture into their habitatarrow_forwardAll of the following are characteristics of annelids except a coelom. a complete digestive tract. segmentation. excretion via nephridia. metamorphosis.arrow_forwardDescribe the molting process in Crustacea, including the action of hormones and the process of ecdysisarrow_forward
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