- The picture below shows four different rock layers in a hillside.
What is the best evidence that one of these layers
of rock was formed under an ocean?
A. the thickness of the layer
B. the type of fossils in the layer
C. the number of caves in the layer
D. the height above sea level of the layer

What's the waste product of electrons and pyruvate combining in fermentation?  

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid