Ch.33 - InvertebratesSee all chapters
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Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
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Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Ecdysozoans

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Sections
Porifera and Cnideria
Lophotrochozoans
Ecdysozoans
Echinoderms

Concept #1: Arthropods and Chelicerata

Concept #2: Crustaceans and Hexapods

Additional Problems
An example of a hermaphroditic crustacean is thea. crabb. lobsterc. barnacled. crayfish
All crustaceans have a unique kind of larva called aa. niaidb. naupilusc. trochophored. planulae. nymph
The foremost appendages on spiders area. pedipalpsb. maxillaec. antennaed. cheliceraee. mandibles
In horseshoe crabs, the most anterior appendages are thea. antennaeb. pinchersc. mandiblesd. pedipalpse. chelicerae
The molting process in arthropods is known asa. ecdysisb. tagmatizationc. metamorphosisd. paedomorphosise. cephalization
Chemicals for insect communication are calleda. ecdysonesb. protosonesc. pheromonesd. deuterosonese. none of the above
While most insects have four wings, _______________ have only two.a. termitesb. fliesc. fleasd. bedbugse. crickets
The second pair of spider appendages is thea. maxillaeb. uropodsc. pedipalpsd. mandiblese. chelicerae
Which one of the following is not a characteristic of the arthropods?a. jointed appendagesb. exoskeletonc. coelomd. segmented bodye. All of the above are characteristic of the arthropods
Which one of the following is not a crustacean?a. lobsterb. copepodc. horseshoe crabd. barnaclee. crayfish
The largest group of arthropods is the:a. arachnidsb. crustaceansc. insectsd. millipedese. centipedes
Having chelicerae, a body divided into an anterior cephalothorax and posterior abdomen, and book lungs is characteristic of:a. arachnidsb. insectsc. millipedesd. crustaceanse. trilobites
Which of the following are not arthropods?a. earthwormsb. crayfishc. spidersd. butterfliese. both a and c
Arthropods molt becausea. Their old exoskelton does not grow with their bodyb. It helps them escape predatorsc. None of the above
Most insectsa. Have two pairs of wings and two pairs of legsb. Have one pair of wings and six pairs of legsc. Cannot flyd. Have two pairs of wings and three pairs of legs
Spiders, scorpians, and mites belong to the subphyluma. Urochordatab. Crustaceac. Trilobitad. Chelicerata
The largest phylum of pseudocoelomates isa. Cycliophorab. Platyhelminthesc. Cestodad. Nematodae. Rotifera
What are the major advantages and disadvantages of an arthropod's exoskeleton?
Why is it important that arthropods have jointed appendages?
Give two characteristics that separate Arachnids from Insects.