explain how food is digested and absorbed using the big idea of particles.

Eutrophication caused by human nutrient pollution.

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

Can an organism fill more than one trophic level?