What is the value of a transitional fossil? a. transitional forms show the evolutionary steps between species. b. transitional forms are analogous fossils. c. transitional forms discredit the theory of evolution. d. transitional forms are proof of punctuated equilibrium in evolution.

The transitional fossils can be defined as the ones that shows the transition or conversion of one species into another. The transitional species shows the link between the two species. It exhibit the features of both the preceding and the proceeding species. One such example of the transitional fossil is the archaeopteryx. It has both the features of the reptiles and the birds.

Hence, the correct answer is 'Option A - transitional forms show the evolutionary steps between species'.