Go back to question 6 or go on to question 7 . 7. Explain in chemical terms how the insects in the figure utilize the host plant also shown in the figure. The insects feed on the milkweed which is toxic to most animals due to cardiac glycosides. This provides them with some protection and they are brightly colored to warn potential predators. Interestingly, cardiac glycosides accumulated by the monarch butterfly caterpillars are passed along through metamorphosis to the butterfly Go back to question 7 or go on to question 8a .
Analgesics are pain killers.
Examples include morphine and codeine from opium poppy and salicylic acid from willow. Go back to question 8a or go on to question 8b . Honey is nectar processed by bees. After the bees collect the nectar from flowers, they store and partially process it in their honey sacs. Honey may also contain pigments and scents.