Female birds tend to select mates based on bright feather coloration. Which rule does this break?

Racism smh

Explanation:

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

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