Monarch butterflies are toxic to many of their predators because they
A) have a mutualistic relationship with a fungus that produces a toxin in exchange for nutrition.
B) have a mutualistic relationship with a bacterium that produces a toxin in exchange for nutrition.
C) eat milkweed and are able to sequester the toxins from that plant.
D) have evolved an enzyme that produces a toxin.
E) None of the above

Question

Quizplus · Accepted Answer

Monarch butterflies eat milkweed, which contains toxins known as cardiac glycosides. The butterflies are able to store these toxins in their bodies, making them toxic to many predators.

Monarch Butterflies Are Toxic to Many of Their Predators Because