this is what u usually learn in these grades for technology
The best way may be is going over the notes on the chapter you were doing. Or going over the chapter once or twice.
Mutation is the only evolutionary mechanism that does little to change allele frequencies.
I think it is beneficial for the brain to be connected to the contralateral side of the body because of the position and connection to the brain that our eyes have. Because light from the right visual fields strikes the left side of the eye and light from the left side strikes the right side of the eye, the connections allow visual information from both sides of the body to reach the brain.
