Why do scientist use physical model of a plant cell instead of studying a cell directly

Explanation:

the purpose of scientific modeling varies.for example three dimensional helix model of DNA are used to visualize a object or system often being created from experimental data.Other models are intended to describe an abstract or hypothetical behaviour or phenomenon

it is b

explanation: mark brainliest because i am trying to get to the next level and i just need 1 more

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