What is a polar molecule?

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

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