div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader042vdocumentinreader042viewer202202121262065ca68c2f7b1730070885html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: Unit 2: Working with Bacteria Introduction Lesson 21 - Xtec src=https:reader042vdocumentinreader042viewer202202121262065ca68c2f7b1730070885html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdiv