The endosymbiotic theory explains how eukaryotic cells may have evolved from prokaryotic cells. Which two organelles are said to have been engulfed (eaten) by this
primitive prokaryote, thereby creating a eukaryotic cell?

A)ribosomes and mitochondria
B)chloroplasts and ribosomes
C)mitochondria and chloroplasts
D)eukaryotes and chloroplasts

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

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )