Question

What is an organism in the same phylum as Macrocystis pyrifera. Where can it be found?

Answer 1

http://www.newworldencyclopedia.org/entry/protist

Algae

Algae, like plants, gather light energy through photosynthesis and convert it into chemical energy. They include many single-celled creatures that also may be considered protozoa, such as Euglena, which have acquired chloroplasts through secondary endosymbiosis. Others are non-motile, and some (called seaweeds) are truly multicellular, including members of the following groups:
Chlorophytes green algae, related to higher plants e.g., Ulva
Rhodophytes red algae e.g., Porphyra
Heterokontophytes brown algae, diatoms, etc. e.g., Macrocystis