Cathode rays wave shown to be a stream of protons electrons neutrons quarks

What organs comprise the respiratory system of a bird

How are viruses different from eukaryotic cells?

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