This is an organ of digestion. It continues the process of mechanical digestion; it secretes gastric juices that continue the process of chemical digestion started in the mouth.

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

How can you tell the difference between rough er from smooth er?

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.