Which of these hominid species is the oldest? a. australopithecus afarenis b. autralopithecus robustus c. homo habilis d. autralopithecus africanus

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.