15 Questions
What is the primary habitat of red algae?
Marine
Which class contains the majority of red algae species?
Florideophyceae
What is the characteristic pigment that gives red algae their color?
Phycobiliproteins
Why are red algae relatively rare in freshwater environments?
Greater concentrations found in warmer areas
What is a distinctive feature of red algae cells?
Flagella and centrioles
Why are there no terrestrial red algae species?
Evolutionary bottleneck resulting in loss of core genes
What type of starch do red algae store outside the chloroplasts?
Floridean starch
Which evolutionary event led to the origin of red and green algae?
Primary endosymbiosis
Where are the Cyanidiophyceae, a class of unicellular and thermoacidophilic extremophiles, found?
Sulphuric hot springs and other acidic environments
What did the secondary endosymbiosis event involving an ancestral red alga and a heterotrophic eukaryote result in?
Evolution of several other photosynthetic lineages
Which clade includes macroalgae, seaweed that usually do not grow to more than about 50 cm in length?
BF clade
What adaptation has made the survival of Cyanidiophyceae in sulphuric hot springs and other acidic environments possible?
Horizontal gene transfers from prokaryotes
Where are most rhodophytes (red algae) found?
Marine environments with worldwide distribution
What type of food product is made from red algae species Porphyra?
All of the above
What makes red algae different from green algae in terms of sugar storage?
Red algae store floridean starch inside the chloroplasts.
Learn about the ancient group of eukaryotic algae known as red algae, or Rhodophyta, which comprises one of the largest phyla of algae with over 7,000 recognized species. Discover their characteristics and their abundance in marine habitats.
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