How can plant spines and bird migrations be categorized as adaptations?

What type of cell is produced after fertilization occurs and the gametes combines ?

What occurs to the cell during mitosis

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