The incas developed a record-keeping system using shells and beads on strings. knots and designs in strings. writing and pictographs. numbers and calculations

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Injuries in the environment are a result of

Australopithecus robustus was likely the longest-surviving species of australopithecine in south africa. it had: a. large molars, a big face, and a sagittal crest. b. a large body, large teeth, and a sagittal crest. c. a big brain, big teeth, and a big face. d. a big face, large teeth, and a large body