How long ago did homo sapiens aprears

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.

How does secondary succession differ from primary succession?