Which of the following is a nonrenewable resource? a. gold b. tree c. carbon d. river

C, h, o - elements that are common to biomolecules. if the biomolecule in question is a protein these elements also combine with nitrogen. which molecule below is a protein?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.)chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.