What’s the difference between a standing defense and an induced defense?
1) standing defenses are based on confronting danger; induced defenses are based on crypsis (hiding)
2) induced defenses are just augmented versions of standing defenses.
3) standing defenses are used by juveniles; induced defenses are used by adults.
4) standing defenses are always present; induced defenses develop in response to a threat

The correct answer is: 4) Standing defenses are always present; induced defenses develop in response to a threat

Induced defense is defense that can be changed or invoked when needed. Induced defenses are slow to happen. When invoked, induced defense requires energy but otherwise doesn’t.

Standing defense is always there. It is use, for example when predation is a constant threat.

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