Biological Perspectives

activities allele amino acids animals atoms autotrophs bacteria Basics behavior biodiversity biological biologists blood cells body body's brain butterflies called cancer carbon dioxide cellular respiration changes Chapter chemical chromosomes circulatory system Click commons complex Contrast cycle digestive disease ecology ecosystem effect electron energy environment environmental enzyme evolution example Expanding Your Perspective female fertilization Figure fish fluid function gametes genes genetic gland glucose growth habitat Hardin homeostasis hormones human hydrogen immune system important increase individual infection inherited interactions intestine involves levels living macromolecules male meiosis membrane molecules monarch Monarch Butterfly muscle natural selection nervous system neurons normal nucleotides nutrients occur organisms oxygen pathogens photosynthesis plants population problems produce protein reactions released reproduction response result scientists secreted sequence sexual species sperm stomach structure substances temperature tion tissue Track Your Understanding tragedy traits types uterus