Which characteristic is shared by all living things

How does the nervous system affect the excretory system?

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

Which step is the same in both forms of fermentation, as well as in cellular respiration?