How much has air pollution been reduced in the last three decades?

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

20 the main source of energy for our planet comes from the

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals