Use the Following Figure to Answer the Question

Multiple Choice

Use the following figure to answer the question.

Halobacterium has a photosynthetic membrane that appears purple. Its photosynthetic action spectrum is the inverse of the action spectrum for green plants (see figure) . That is, the Halobacterium action spectrum has a peak where the green plant action spectrum has a trough. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?

A) red and yellow
B) violet and blue
C) green and yellow
D) blue and red