What type of bond is formed by the union of nonmetals with metals

What does the positioning of transcription factors determine?

Ecology can best be described as the study of what

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