Context: Insects were among the earliest terrestrial herbivores and acted as major selection agents on plants. Plants evolved chemical defenses against this herbivory and the insects, in turn, evolved mechanisms to deal with plant toxins. Many insects make use of these toxins to protect themselves from their predators. Such insects often advertise their toxicity using warning colors. This successful evolutionary pattern has also been used by mimics. Over time, this has led to complex groups of coevolved species. Conversely, some interactions between plants and insects, like pollination, are beneficial to both organisms. Coevolution has led to the development of very specific mutualisms in such systems.

Question: What type of defense did plants adaptively evolve in response to insects?
Answer: chemical

Question: What is the term for a plant-eating insect?
Answer: herbivores

Question: What do many insects adaptively utilize in self-defense from predators?
Answer: plant toxins

Question: How is toxicity sometimes visibly displayed by insects as a warning?
Answer: colors

Question: What is an example of a mutually beneficial process indicating the coevolution of plants and insects?
Answer: pollination

Question: Insects are considered terrestrial what?
Answer: herbivores

Question: What were insects the major selection agents of?
Answer: plants

Question: What did plants eventually form against insects?
Answer: chemical defenses

Question: Insects formed mechanisms to shield against what?
Answer: plant toxins

Question: Insects show how toxic they are with what kind of colors?
Answer: warning colors