Yeast

Grows when warm (~37C).
Properties
Section	Powders
Spawn temperature	22°C
Heat Conductivity	28%
Relative weight	80
Gravity	0.1
Acid dissolve rate	3%
Flammability	15
State	Powder
Transitions
High temperature	above 99.85°C
Source code

Yeast grows when warm (between 29.85°C and 43.85°C) and turns into dead yeast when overheated above 99.85°C.

Reactions

Yeast becomes dead on contact with dead yeast:

+ → 2×

Neutrons also kill yeast:

+ → +