Why does an increase in
blood carbon dioxide
correlate to a decrease of
blood oxygen?

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Which of these is not a nucleotide base found in dna?

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