Read the following descriptions regarding specific types of plastids: Plastid 'P' stores carbohydrates (e.g., starch in potato). Plastid 'Q' stores oils and fats. Both 'P' and 'Q' are specific types of 'R', which are colourless plastids of varied shapes and sizes. Identify P, Q, and R.

Step-by-step solution

Based on the classification of plastids: 'R' represents leucoplasts, which are colourless plastids of varied shapes and sizes with stored nutrients. 'P' represents amyloplasts, a type of leucoplast that stores carbohydrates (starch), for example in potatoes. 'Q' represents elaioplasts, which are leucoplasts that store oils and fats. Aleuroplasts are leucoplasts that store proteins, and chromoplasts are coloured plastids containing fat-soluble carotenoid pigments. Answer: P - Amyloplast, Q - Elaioplast, R - Leucopla