What is meant by "mushroom seed" ?

What is done in the step called "casing" ?

Production of ethanol (C₂H₅OH) occurs in one of the life processes of:

1. Bread mould
2. Yeast
3. Mushroom
4. Penicillium

Which among the following statements is incorrect about fungi ?

1. They are multicellular organisms except yeasts.
2. They are heterotrophic and are either parasitic or saprophytic.
3. They prefer cold and dry conditions to grow.
4. They are immobile unlike bacteria.