What is a cortex of a spore?

The cortex of a spore refers to the outer layer that provides protection and structural integrity. It is typically composed of several layers, including the exosporium and the spore coat, which help shield the spore from environmental stresses such as desiccation, heat, and UV radiation. This protective layer plays a crucial role in the spore's ability to survive in harsh conditions until it germinates under favorable circumstances.