Final answer:
Plants use physical and chemical defense strategies to protect themselves from herbivores and pathogens. Physical defenses act as barriers while chemical defenses produce toxic or unpalatable substances.
Step-by-step explanation:
The two different types of plant defense strategies are physical and chemical defenses. Physical defenses include structural barriers such as thorns, a waxy cuticle, and a tough cell wall that physically deter herbivores and pathogens from causing damage. Chemical defenses involve the production of compounds that are toxic or unpalatable to potential attackers, like the digitalis produced by foxglove plants, which are highly toxic when consumed.Chemical defenses involve the production of toxic compounds that deter herbivores and pathogens. For example, plants may produce secondary metabolites like alkaloids or terpenoids that are toxic to insects or animals.