Which evidence best supports the skulls shown below share a common ancestor?
Given a fossil record that shows long periods of little change in a species followed by abrupt changes.
Due to the experience of a stable environment interrupted by episodes of abrupt change describes the theory of .
The type of evolution shown above is because there is environmental changes followed by a period of stasis resulting in the of biodiversity.
Based on the picture below, tortoise and chick have similar structures in early development and similar nitrogen base sequence. What do these similarities prove?
The diagram below illustrates fossils from different theropod species. "Theropods" are a group of two-legged dinosaurs that are ancestors of modern birds.
Which statement provides the best evidence that "Coelophysis" is an ancestor of "Tyrannosaurus rex"?
In their early development stages, snake embryos begin to form small limb structures. However, as the embryos continue to grow, these structures stop developing and eventually disappear before the snake is born.
Which statement best explains why limb buds briefly appear in snake embryos but do not fully develop into limbs?
Who is the common ancestor of the gorilla and the rat?

Scientists examined various bird species and compared their mitochondrial DNA sequences. The table below displays the number of genetic similarities observed among different bird populations.
Which conclusion about the relatedness is supported by this data?
Scientists can determine relatedness among organisms by comparing partial amino acid sequences. The table (below) shows four partial amino acid sequences from four different organisms.
is least closely related to Organism B and is most closely related to Organism B.
A monotremes organism is a mammal that lays eggs. Both the platypus and echidna are monotreme organisms native to Australia.
Both of these mammals lay eggs and produce milk for their young provides evidence that they...
A cladogram of five species is shown below.
Based on the cladogram, the wolf has which of the following characteristics? (Select ALL that apply)

Based on the cladogram above, which two organisms are the least related?
The limbs and function of a cat, frog, and bat and how they are shown below.
According to the illustration, the limbs offer evidence of common ancestry because they...
Below is the evolution of Equus (the modern-day horse). The earliest known species, Eohippus, which lived 50 million years ago, stood at a height of approximately 0.4 meters, whereas Equus reaches a height of around 1.6 meters.
However, scientists have observed that the overall bone structure of horses has remained relatively unchanged over the past 50 million years.
Which of the following statements is best supported by this information?