Is a type of genetic drift resulting from a reduction in population such that the surviving population is no longer genetically representative of the original population?

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material