AP BIOLOGY

Detailed explanation-1: -Transitional fossils are important because they demonstrate the evolutionary changes that occur between organisms, namely a common ancestor and its descendants. In general, transitional fossils are imprints of organisms, which displayed traits seemingly intermediate between its common ancestor and its descendants.

Detailed explanation-2: -Transitional fossils help scientists bridge gaps in the tree of life, resulting in a picture of gradual evolution over millions of years. Transitional Tetrapod Fossil: According to modern evolutionary theory, all populations of organisms are in transition.

Detailed explanation-3: -Transitional Values are the values found between the midtones and the shadows, and between the midtones and the highlights of a subject. The amount of transitional value we see on a portrait subject, for instance, is determined by the quality of the light source.

Detailed explanation-4: -A transitional fossil is any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group. This is especially important where the descendant group is sharply differentiated by gross anatomy and mode of living from the ancestral group.

Detailed explanation-5: -The transitional fossils are fossils that show intermediary links between groups of organisms. It provides a link between the past and present species. These transitional fossils are the strongest evidence of Darwin’s theory of evolution.