Compare the structural features and functions of the various layers of thallus of lichens. (Fill the table)

Layer name Structural features Function to be performed
Upper crust Tightly intertwined gifs Protective
Algal Algae or cyanobacteria are braided by hyphae Photosynthesis
Core Loose-positioned GIFs Airing, maintaining humidity
Lower crust Tightly intertwined gifs Protective, attachment
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