At the end of which era did the dinosaurs became extinct? 1. Mesozoic
2. Paleozoic
3. Jurassic
4. Cenozoic

The Mesozoic era should be the correct answer

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

the median of the data is 4.5.