(1), black rice and wheat all have only one cotyledon, belonging to monocotyledonous plants, and the nutrients are mainly stored in endosperm.

(2) Liquor-making should use distiller's yeast, and distiller's yeast is mainly yeast and Aspergillus. Yeast and Aspergillus are both fungi and belong to decomposers in the components of ecosystem.

(3) Life and fermentation of yeast, Aspergillus, etc. Appropriate temperature is needed, and the most important thing in beer production is to control environmental factors such as temperature and PH value.

So the answer is: (1) monocotyledons; endosperm

(2) Aspergillus and yeast; Decomposer

(4) Temperature