Write the functions of each of the three basic cell types, and sketch or describe their appearance in the chart below. Don't do the sketch or description part only do the functions part.

1. isogamy 1 organisms with gametes of the same size and shape 2. anisogamy organisms with gametes of different sizes and shapes 3. oogamy 2 organisms with gametes of the same shape but different sizes 4. gonads gamete-producing organs in lower plants 5. gametangia gamete-producing organs in animals