Which compounds represent the reactant(s) in the chemical equation below?

c3h8 + 5o2 → 4h2o + 3co2
a) only c3h8
b) both c3h8 and 5o2
c) 4h2o
d) 3co2

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