1. Seed: A seed is a matured ovule containing an embryo, used for planting and producing new plants. It is specifically processed and treated for sowing purposes.
2. Grain: A grain is the harvested product of cereal crops, used primarily for consumption or trade. It is not treated or processed for planting. Key Difference: Seeds are selected for reproduction, while grains are for consumption.
In the adjoining figure, \( AP = 1 \, \text{cm}, \ BP = 2 \, \text{cm}, \ AQ = 1.5 \, \text{cm}, \ AC = 4.5 \, \text{cm} \) Prove that \( \triangle APQ \sim \triangle ABC \).
Hence, find the length of \( PQ \), if \( BC = 3.6 \, \text{cm} \).