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25 Cards in this Set
- Front
- Back
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The layer that gives rise to the muscles, circulatory, reproductive, and excretory systems is the
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mesoderm
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feeding habits of sponges can be described as
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filter feeders
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the simplest animals having radial symmetry are
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cnidarians
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cnidarians have two basic body types, a medusa and a
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polyp
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body symmetry of a cnidarian is
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radial in both medusa and poly stages
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some flatworms have clusters of nerve cells that control the nervous system called
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ganglion
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flatworms detect changes in the amount of light in the environment using groups of cells called
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eyespots
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in a pseudocoelom, mesoderm partially lines the
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body cavity
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the animal with a true coelom is the
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earthworm
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mollusks have
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a true coelom
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the thin layer of tissue that covers a mollusks body is called the
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mantle
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appendages of arthropods are
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jointed and extend from the body wall
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one similarity between a spider and crayfish is that both have
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a cephalothorax and an abdomen
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the body of an insect is divided into a
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head, thorax, and abdomen
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the skeleton of an echinoderm is an
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endoskeleton
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in an echinoderm, the structure that operates like a living suction cup is the
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tube foot
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in chordates, the long supporting rod that runs through the body is
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the notochord
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which characteristic is present in all chordates?
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ALL OF THE ABOVE (tail, notochord, pharyngeal pouch)
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a vertebrate is any chordate that has
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a backbone
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two groups of nonvertebrate chordates are
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tunicates and lancelets
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if an animal has 3 germ layers, bilateral symmetry, and no coelom, then it is a
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flatworm
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the most likely ancestors of animals are
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animal like protists
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cnidarians and chordates share the characteristic of
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extra cellular digestion
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spiders respire through specialized structures called
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book lungs
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one animal that has a digestive tract, ectoderm, endoderm, and mesoderm are
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roundworms
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