Why is it important for the brain to be so well protected?

How are gene and protein sequences used to classify organisms?

Explain the process that creates the heat of the sun?

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water