The graph below shows the amount of carbon dioxide produced annually. Which of the following factors would have contributed the least to the increase in annually produced carbon dioxide between the years 1970 and 1990?

Scientific thinking: what clues about biology might road kill provide?

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

Select the correct answer. in the image, if the washcloth represents consumed food, which organ of the digestive system correctly represents the action performed by the hands? hands squeezing water from a washcloth a. esophagus b. large intestine c. liver d. mouth