Which of the following characteristics do most amphibians share? A. Amphibians spend their entire lives on land,

B. Amphibians lay their eggs in water.

C. Amphibians are invertebrates.

D. Adult amphibians use gills to breathe.

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