Matter and energy can never bee created or destroyed. Explain how photosynthesis and cellular respiration demonstrate this law of nature.

They are both connected to each other. The products of photosynthesis (oxygen and glucose), is used as reactions for cellular respiration. The products of cellular respiration (carbon dioxide, water, and energy) is used as reactions for photosynthesis. So the energy is never created nor lost, the energy is just transferred for the other processes uses.

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Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.