Mollusca, Arthropoda, Echinoderm Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Define cephalopoda | Cephalo means head and poda means footed
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| what is the name of the tube-like structure which water enters and leaves a mollusk's body? | siphon
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| Which mollusk is the most active? | cephalopods
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| Which cephalopods have external shells? | nautiluses
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| What is the largest class of mollusks? | gastropods
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| What are the general characteristics of the phylum mollusca? | bilateral, 3 tissue layers and a coelom
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| What are the classes of Mollusks and give an example of each? | cephalopoda, octopus
bivalvia, clam
gastropoda, abalones, snails
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| What is a coelom? What are the tissue that line this cavity? | A fluid-filled body cavity; mesoderm
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| What are tentacles? | a divided foot in mollusks
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| What is the function of excurrent siphon? Incurrent siphon? | Excurrent, remove wastes and carbon dioxide
incurrent, bring in oxygen and food
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| How do most aquatic mollusks breathe? | gills, diffusion
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| How are crustaceans different from other arthropods? | two pairs of antennae
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| What are some animal examples of class arachnida? | ticks, mites and scorpions
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| What is the largest class of arthropods? | Class Insecta
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| What are jointed appendages and what do they allow? | allow powerful movements and greater flexibility
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| A grasshopper excretes metabolic wastes through this structure? | malpighian tubules
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| What are the common characteristics of arthropods? | bilateral, jointed appendages, exoskeleton
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| What is the polysaccharide that makes up the exoskeleton of arthropods? | chitin
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| Name the classes of arthropods and how do scientists categorize them? | Arachnida, 8 legs
Merostomata, 8 legs, carapace
Diplopoda, 2 pairs of legs per segment
chilopoda, 1 pair of legs per segment
Insecta: 6 legs
Crustacea: 10 pairs of legs, one pair of claws
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| What are the common characteristics between arachnida and merostomata? | 2 main body regions, book lungs/book gills and chewing mouthparts
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| How are spiders different from insects? | 8 legs vs. 6 legs,chelicera in spiders, 2 body regions vs 3 body regions.
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| What are the structures in echinoderms responsible for respiration and movement? | tube feet
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| What is the skeleton of the echinoderm made of? | endoskeleton made of calcium carbonate
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| What are the body functions of the water vascular system? | respiration, circulation, movement
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| What animals belong to the phylum echinodermata? | sand dollars, bristle stars, sea urchins
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| How many species of echinoderms exist today? | 7,000
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| What are the five classes and give an examples of each? | Crinoidea, sea lily, feather stars
Ophiuroidea, basket stars, brittle stars
Echinoidea, sea urchins, sand dollars
holothuroidea, sea cucumber
asteroidea, sea stars
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| What is the name of the echinoderm that lives on hard surfaces and they can sometimes contain venom? | sea urchin
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| What is the system that carries oxygen throughout the body of an echinoderm? | water vascular system
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