Evolution
2
Evolution of whale (fossil record) • In 1978, paleontologist Phil Gingerich discovered a skull in Pakistan that had characteristics in common with the Archaeocetes, the oldest known whales. The reconstructed skeletons from modern whales and various ancestral skeletal forms are in chronological order. Indohyus is an extinct whale “cousin”.
description
Presentation about evolution in biology, including fossil record, selective breeding, etc.
Transcript of Evolution
Slide 1
Evolution of whale (fossil record)In 1978, paleontologistPhil Gingerichdiscovered a skull in Pakistan that had characteristics in common with theArchaeocetes, the oldest known whales.
The reconstructed skeletons from modern whales and various ancestral skeletal forms are in chronological order.Indohyusis an extinct whale cousin. Most of the evidence for evolution comes from the fossil record. Fossils show how much, or how little, organisms have changed over time.Relative body size, to scale, is indicated by the gray shapes at the right of each animal.
1Evolution of dog (selective breeding)In 1959, a Russian geneticist, Dmitry K. Belyaev, curiously wanted to find out how dog domestication occurred.The domestic dog is thought to have descended from the gray wolf.As selected wild wolves with desirable characteristics were bred, over time this resulted in a more desirable species from a human point of view.
People have always selected dogs from which to breed to produce the best working animals -- herders, guards, and eaters
2
