activity three point five numerical word written on red colour covering text form

activity autotrophic background biological black blood body border canal centralize circle circles color colour corpuscles covered covering dark dental diagrams displayed displaying english equation experimental five food form formula geometric glands heterotrophic highlighted highlights ion language life marker media multicolored numerical orange organs origin page paper parasitic pattern pen peristalsis point presentation presented presenting protein reaction red related resources respiratory saprotrophic sheet significance six symbiotic symposium system testing text texting three tools transpiration underlined vessels water white word written yellow