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The Scientific World View
Classifying Living Things
What Is Life?
29 other sections not shown
abortion acid acid rain amount animals atoms bacterium become behavior biologists blood body cells brain called carbohydrates carbon dioxide carrying capacity cause chromosome copepods Cro-Magnon disease Earth ecosystem egg cell electrical electrons embryo energy units environment enzymes evolution evolved example female fetus fish food chain fossil galaxies gases genes genetic glucose green plants groups growth heat helium Homo Homo erectus Homo habilis hormones human population hydrogen individual kilometers layer living cells living matter lungs male mammals mate million years ago million years b.p. molecules Moon motion muscles nerve neutrons nonliving nuclear nucleus nutrient molecules ocean orbital organisms oxygen ozone percent photosynthesis pollution produce protein protons radiant energy radiation radioactive rain forests release reproduction rock Science scientific scientists sensory sexual solar species sperm cells stars Sun's temperature tiny tubes uterus Vitamin wastes wavelengths