Which of the following two cycles are the most closely related in their role in sustaining life? a. carbon and nitrogen b. water and nitrogen c. carbon and oxygen d. nitrogen and phosphorus

Which is abiotic? a. tree sap b. insect c. sunlight d. wood table

True or false most plants are c3 plants, because they use molecules of carbohydrate known as g3p in their photosynthesis process.

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.