Wheat rust is caused by?

Step-by-step solution

The common mushroom you eat and toadstools are also fungi. White spots seen on mustard leaves are due to a parasitic fungus. Some unicellular fungi, e.g., yeast are used to make bread and beer. Other fungi cause diseases in plants and animals; wheat rust-causing Puccinia is an important example . Some are the source of antibiotics, e.g., Penicillium.