Phycobiliproteins are a. found in purple sulfur bacteria. b. found in cyanobacteria. c. used to gather wavelengths of light that are not well absorbed by chlorophyll. d. are used to reduce hydrogen sulfide. e. found in cyanobacteria and used to gather wavelengths of light that are not well absorbed by chlorophyll.

The correct answer is option E.

Explanation:

The deep-colored, water-soluble proteins, which are mainly found in Rhodophyta and cyanobacteria are known as phycobiliproteins. They captivate the light energy and then pass it to the chlorophyll at the time of photosynthesis.  

They are comprised of proteins and are covalently attached through cysteine amino acid chromophores known as phycobilins. Thus, the correct answer is option E.  

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.