1. Which of the following statements best describes how genes relate to traits? a. Genes code for the production of specific proteins. These proteins lead to different traits. b. Genes and traits function together to produce proteins c. Traits contain instructions for making proteins, and genes are the observable outcome of such proteins. d. Genes are expressed according to instructions in traits.​

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.

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above