What are some of the things you can train a rat to do?

What is the best way to train the rat?

What is the best age to train a rat at?

:)

Not looking for negative reinforcement because I can't imagine hurting such small creatures in any way but thanks for the help!

The negative impacts of nonnative species generally outweigh the positive impacts

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.

Is there any solid scientific evidence that humans have been cloned?