Answer the questions about the diagram. Organism
✔ D
appears in the least outcrops.

Organisms
✔ B and C
are the oldest.

Organism
✔ A
would make the best index fossil.

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

Which of the following statements about protists are true? a. they are typically found in moist environments. b. they are all unicellular. c. they have a nucleus. d. they are all multicellular.

What is an example of a scientific question that galileo could not have answered with out this new tool?