Components of Male Reproductive Part Function A. Vegetative Cell 1. Enables pollen grain to be preserved as fossils B. Generative Cell 2. Forms 2 male gametes C. Exine 3. Supplies nutrients to horses and athletes D. Pollen Grain 4. Acts as food reserve

Step-by-step solution

The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known. Pollen grains are wellpreserved as fossils because of the presence of sporopollenin. The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin. When the pollen grain is mature it contains two cells, the vegetative cell and generative cell (Figure 2.5b). The vegetative cell is bigger, has abundant food reserve and a large irregul