What marks the furthest advance of a glacier

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

Aplant may open end close its stomata to prevent excess water loss and maintain

Ducks and beavers both have webbed feet