In the given diagram of pollen grain, identify the labels 'A' and 'B'

Step-by-step solution

Based on the provided diagram of a mature pollen grain at the 2-celled stage: 1. The pollen grain is surrounded by a two-layered wall. The outer hard layer is the exine, and the inner continuous layer is the intine. Label 'A' points to the inner layer, which is the intine. 2. Inside the pollen grain, there are two cells: a larger vegetative cell and a smaller generative cell. The generative cell is spindle-shaped and floats in the cytoplasm of the vegetative cell. Label 'B' points to the nucleus of this smaller cel