If less than 1% of tropical rainforest plants have been tested for their medicinal properties and half of the 3000 plants known to have anti-cancer properties were discovered in tropical rainforests, how many are still waiting to be discovered? A) 1,500 B) 15,000 C) 150,000 D) 1,500,000

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