Question

Factors responsible for the rapid spread of bread mould on slices of bread are

1. large number of spores
2. availability of moisture and nutrients in bread
3. presence of tubular branched hyphae
4. formation of round shaped sporangia

Options

• (i) and (iii)

• (ii) and (iv)

• (i) and (ii)

•  (iii) and (iv)

Answer 1

(i) and (ii)

Explanation - 

Bread mould is a saprophyte which lives on dead and decaying plant material and obtain its nutrition. It reproduces asexually through production of thick-walled spores. These spores germinate to form hyphae on coming in contact with moist surface. So, the factors responsible for the rapid spread of bread mould on slices of bread are large number of spores and availability of moisture and nutrients in bread.