What is natural selection, in your own words?

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

Describe the two types of vascular tissue

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