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lesson 1 and 2
science
Question | Answer |
---|---|
what is homeostatis | keeping internal body conditions stable |
what are adaptaions | structures and behaviors that allow animals to preform their functions |
what are vertebrates | animals with a backbone |
what are invertebrates | animal without a backbone |
what is a tissue | a group of similar cells that preforms a specific function |
what is an organ | made up of different tissues |
what is radical symmetry | if many imaginary lines can be drawn through a central point to divide it into two mirror images |
what is bilateral symmetry | if only one line of symmetry can be drawn to divide it into halves that are mirror images |
what are cnidarians | Invertebrates that have stinging cells |
what are mollusks | invertebrates with soft, unsegmented bodies that are often protected by a hard shell |
what are arthropods | invertebrates that have hard outer coverings, segmented bodies and pairs of jointed appendages |
what is the exoskeleton | the outer covering |
what is an echinoderm | an invertebrate that has an internal skeleton and a system of fluid filled tubes |
what is an endoskeleton | an internal skeleton |