Which part of the central nervous system is used to used to serve as the main communication link between the body and the brain? a. cerebellum b. spinal cord c. brain stem d. cerebrum

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