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.
The first part states that all organisms are made of cells.
Photosynthesis starts when a photon- a tiny packet of light is absorbing a molecule of chlorophyll.