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Compare the productivity of terrestrial and aquatic ecosystems against the percent of earth’s surface area they occupy.
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Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .
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What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent
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Compare the productivity of terrestrial and aquatic ecosystems against the percent of earth’s surfac...
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