What conclusion can you draw from the presence of the adult blowfly eggs on the corners of Anna's mouth and nostrils?

Anna has been dead for more than a few hours.

Explanation:

There must have been enough time for the flies to find the body and lay the eggs.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products