according to the animation, how does ubx provide an example illustrating major morphological differences among groups of animals that result from small changes in gene expression?

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.