Which of these events happended first?

Select the word from the list that best fits the definition a system made of 25 satellites

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods. c. it shows that these organisms share the same habitat. d. it provides evidence that these organisms suffered a genetic mutation.

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart