What type of organism results from the symbiotic relationship between a fungus and photosynthetic algae?

The organism that results from the symbiotic relationship between a fungus and photosynthetic algae is known as a lichen. This unique partnership involves the fungus benefiting from the organic compounds produced by the algae during photosynthesis, while the algae gain protection and a suitable habitat from the fungal component.

Lichens are notable for their ability to thrive in harsh environments where neither partner could survive alone, showcasing the successful collaboration between fungi and algae. This relationship enhances their resilience and adaptability, allowing lichens to colonize a variety of surfaces, such as rocks, tree bark, and soil.

In contrast, mosses are a distinct group of plants that are not formed through a symbiotic relationship with fungi and algae. They are non-vascular plants that belong to the bryophyte group, whereas the options of fungus and alga refer to individual organisms rather than the composite nature of lichens. Thus, lichen is the correct answer because it specifically represents the outcome of the symbiotic interaction between the two different types of organisms.