explain how the structure and the function of squamous epithelium in the lung are important for gas exchange(4 marks)

The series of transgressions and regressions that produce cyclothems were likely produced by

Look at the picture below . what does this picture represent ?

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