How does the cryosphere and the hydrosphere interact?

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?

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