B. Vesicles also are present where lateral branches are initiated. Fungi that never become more structurally complicated than a mycelium are called molds . Some others can form complex structures composed of tissues. E.g., a mushroom . A mushroom is an ephemeral organ, whose function is to produce spores and aid in their dispersal.
All fungi reproduce by spores .
Especially important in recycling the carbon locked up in cellulose and lignin. Economically the most important of these are crop pathogens. A. Fungus infects grains , whose insides become filled with smelly black spores . A superior ability to absorb relatively insoluble phosphate compounds from the soil. Many modern plants are unable to compete in nature without their mycorrhizal partner.