BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 23, Problem 4SA
Summary Introduction
Introduction:
The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. Animals do not contain a cell wall and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food. Cnidarians are the animals that live in marine areas.
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Chapter 23 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 23 - An ______ develops from a two-layer embryo. a. sea...Ch. 23 - A great adaptive radiation of animals that...Ch. 23 - Prob. 3SACh. 23 - Prob. 4SACh. 23 - Prob. 5SACh. 23 - Prob. 6SACh. 23 - Prob. 7SACh. 23 - Prob. 8SACh. 23 - The ______ include the only winged invertebrates....Ch. 23 - Prob. 10SA
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- Members of Chondrichthyes differ from members of Osteichthyes by having a _______. a. jaw b. bony skeleton c. cartilaginous skeleton d. two sets of paired finsarrow_forwardCrustaceans are _____. a. ecdysozoans b. nematodes c. arachnids d. parazoansarrow_forwardWhich of the following is not a member of the phylum Chordata? a. Cephalochordata b. Echinodermata c. Urochordata d. Vertebrataarrow_forward
- Unlike other coelomate animal phyla, mollusks lacka. segmentation.b. cephalization.c. three primary tissue layers.d. some type of body cavity.arrow_forward1. Articulate brachiopods are so-called because: a. they can communicate with one another b. they are divided by a pivot into two parts c. their valves interlock by means of teeth and sockets d. they have mouths full of teetharrow_forwardArthropods are the first phyla to possess: A)a brain B)an exoskeleton C)a complete digestive system D) an endoskeleton E) gillsarrow_forward
- What is a key characteristic of all arthropods? a. Six legs c. Hydrostatic skeleton b. Pseudocoelom d. Exoskeletonarrow_forward2- Inarticulate brachiopods: a) are extinct because they were unable to communicate b) have a radically different kind of pedicle c) have shells which are made of chitin and phosphate d) lack any form of moutharrow_forwardwhihc of the following arthropod regions does not bear legs a) cephalothorax b) abdomen c) all of the above d) trunk e) thoraxarrow_forward
- Nematodes once were thought to be closely related torotifers due to the presence of a pseudocoelom but are nowconsidered more closely related to the arthropods due toa. molting. c. wings.b. jointed appendages. d. a coelom.arrow_forwardWhich is NOT true about the acrchaeopteryx fossil: A) had jaws with sharp teeth B) had three fingers with claws C) lived around 60 million years ago D) had a long bony tailarrow_forwardBoth cartilaginous and bony fishes have______ . a. jaws d. a swim bladder b. a bony skeleton e. a four-chambered heart c. lungs f. all of the abovearrow_forward
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