Intro to Animals
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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| the series of cell divisions that occur immediately after an egg is fertilized | cleavage
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| an animal that obtains food by eating other organisms or their by products | heterotroph
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| a cavity that is filled with water and that has a support function | hydrostatic skeleton
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| a body cavity that contains the internal organs | coelom
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| a hard, external, supporting structure that develops from the ectoderm | exoskeleton
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| the formation of embryonic germ layers | gastrulation
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| a cavity that serves both digestive and circulatory purposes in some animals | gastrovascular cavity
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| a type of egg that is produced by reptiles, birds, and some mammals that contain a large amount of yolk | amniotic egg
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| an animal whose mouth does not derive from the blastopore | deuterostome
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| the staage of an embryo before gastrulation | blastula
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| the concentration of nerve tissue and sensory organs at the anterior end of an organism | cephalization
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| an internal skeleton made of bone and cartilage | endoskeleton
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| animal that does not have a backbone | invertebrate
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| a stiff rod that develops along the back of an embryo | notochord
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| the embryonic blastopore develops into the mouth | protostome
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| a member of the extinct order of mammal-like reptiles that likely gave rise to mammals | therapsid
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| an animal that has a backbone | vertebrate
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| cells that lack cell walls | multicellular heterotroph
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| a bony skull and an internal skeleton made of bone or cartilage | vertebrates
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| most bilaterally symmetrical animals have an anterior concentration of sensory structures | cephalization
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| end result of cleavage | blastula
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| the blastula begins to collapse inward during... | gastrulazation
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| extinct order of mammal-like reptiles that were dominant on land briefly and that gave rise to mammals | therapsid
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| a rod-shaped supporting axis found in the dorsal part of the embryos of all chordats, including vertebrates | notochord
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| watertight, scale-covered skin and the amniotic egg | the major evolutionary innovations that first appeared in reptiles
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Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
la2012
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