(2) Evolution explains the millions of varieties of organisms on Earth.. CC-BY-SA 3.0.(3) http://en.wikipedia.org/wiki/File:Chopping_Board.jpg. GNU-FDL.(4) M_Faraday_Lab_H_Moore.jpg. Public Domain.(5) Robert A. Thom.[Wikipedia ]. Public Domain.(6) A scanning electron microscope.. GNU-FDL.(7) A mouse cell viewed through a microscope.. GNU-FDL.(8) NASA.The Phylogenetic Tree of Life. Public Domain.(9) A male lion.. CC-BY 2.0.(10) NCBI.http://commons.wikimedia.org/wiki/File:Celltypes.svg. Public
Domain.
(11) http://en.wikipedia.org/wiki/Image:
Optical_microscope_nikon_alphaphot.jpg. Public Domain.
(12) http://en.wikipedia.org/wiki/Image:
Van_Leeuwenhoek%27s_microscopes_by_Henry_Baker.jpg. Public Domain.
(13) USGS.http://en.wikipedia.org/wiki/Image:WNVUSAMap.png. GNU-FDL.
(14) A pond with frogs.. GNU-FDL.
(15) A Humpback whale.. GNU Free Documentation.
(16) http://en.wikipedia.org/wiki/Black_Death. Public Domain.
(17) http://commons.wikimedia.org/wiki/Image:Pcr_machine.jpg. Public Domain.
(18) Talia Karasov.. CC-BY-SA.
(19) Robert Hooke’s early microscope.. Public Domain.
(20) Humboldt1805-chimborazo.jpg. Public Domain.
(21) USGS. A frog with an extra leg.. Public Domain.
(22) http://en.wikipedia.org/wiki/File:Phoca_vitulina_Telemetry.jpg.
CC-BY-SA 2.5.
(23) A healthy newborn being examined by a doctor.. GNU-FDL.
(24) The Biohazard symbol.. Public Domain.