Describe HOW fossils can provide evidence of how environmental conditions and life have changed during Earth's history.

What adaptation is apparent in the bodies of the three tortoise species shown in figure 16-2

What is the name for a substance formed in a chemical reaction

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.