Final answer:
Colorless plastids that can synthesize and store various substances, such as starch and oils, are collectively called leucoplasts.
Step-by-step explanation:
Colorless plastids that can synthesize and store various substances, such as starch and oils, are collectively called leucoplasts. Leucoplasts are a type of plastid that do not contain pigments. They are mainly found in roots and non-photosynthetic tissues of plants, and can specialize in bulk storage of starch, lipid, or protein.