Answer
b. red algae— eukaryotes that acquired plastids by secondary endosymbiosis
Work Step by Step
Red algae are eukaryotes, but they did not acquire plastids by secondary endosymbiosis.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.