The number of waves passing the observer per second is: - the wavelength
- the amplitude
-the frequency
- the period

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.

the correct answer was location c, because earth is tilted away from the sun at this time