Select from the following the conditions responsible for the rapid spread of bread mould on a slice of bread : (i) Formation of large number of spores (ii) Presence of moisture and nutrients in bread (iii) Low temperature (iv) Presence of hyphae

The rapid spread of bread mould (Rhizopus) is facilitated by specific biological and environmental factors:

1. Formation of a large number of spores (i): The sporangia produce thousands of tiny, lightweight spores that easily disperse through the air, increasing the chances of colonization.
2. Presence of moisture and nutrients in bread (ii): Spores require moisture and organic nutrients to germinate and grow. A moist slice of bread provides the ideal substrate.
3. Low temperature (iii): Low temperatures actually retard fungal growth; bread mould grows faster in warm, humid conditions.
4. Presence of hyphae (iv): Hyphae are the vegetative thread-like structures of the fungus, not an environmental condition or reproductive factor responsible for rapid spread.

Therefore, statements (i) and (ii) are the correct conditions.