Scientists have developed a new drug known to cure a previously incurable disease. what best explains if the new drug is a compound or not? a. it is a compound because it will be able to cure a disease. b. it is not a compound because it was developed by scientists. c. it is a compound because compounds make all types of matter. d. it is not a compound because compounds make up only living things.

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

The negative impacts of nonnative species generally outweigh the positive impacts