Multiple choice Which of the following is a pair of red algae? Fucus and Gelidium Batrachospermum and Nostoc Gelidium and Batrachospermum Laminaria and Fucus Nostoc and Laminaria Reveal answer Fill a bubble to check yourself C Correct answer Explanation Gelidium is a genus of red algae with a very wide geographic range. Batrachospermum is a genus of freshwater red algae.