Some characteristics of life are shared by all organisms on earth. Explain how the following observations made in Fairmount park provides evidence to support two specific characteristics of living things. "A robin flies to an oak tree and sits on its nest of blue eggs. you return two weeks later and you observe the same robin feeding worms to the baby robins."

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

"a.) well–developed vascular system."

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!