In a classic experiment carried out by the biologist Hop
dic 20 century, 20 young rats were divided into two groups.
One group was fed on a diet of pure carbohydrate, lipid and
protein; the other was fed the same diet. but with some added
milk. The rats were weighed every day. After 18 days the diets
of the two groups were swapped over.
Explain why 20 rats were used rather than just 2

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

Explain why biological control methods are generally environmentally superior to chemical pest control methods.