What species first appeared to walk upright?
homo erectus
homo habilis
neanderthals
australopithecines

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Name the type of chemical that speeds up digestion

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.