By pairing the ringing of a bell with the presentation of meat, the russian physiologist trained dogs to salivate at the sound of a bell even when no meat was presented.

In some states, medical marijuana is legal. this means that people who need to take marijuana because of a medical condition may take it only with approval from the doctor. however, officers still advise these people not to drive while under the influence. what is the main reason for this? they would become dangerous to themselves and other people. they would not able to read and follow street signs. they would not be capable of staying in only one lane. they would become dangerous to wildlife that may be present.

Can someone give me one specific health problem (within unhealthy eating) and explain it. !

Based on the chart, what are the three most effective methods to protect against pregnancy?