Describe the four sources of evidence for evolution upon which Darwin based his ideas in common descent.

- Fossil record

- Geography

- Embryology

- Comparative anatomy

Explanation:

The four types of evidence for evolution upon which Darwin based his ideas were:

1-The geographic distribution of related species. The theory of evolution states that species evolve in geographic areas that were colonized by their ancestors.

2-The fossil record shows successions of organisms through time

3-Embryology: animal embryos in related species are very similar in the early stages of development but differentiate as they grow, thereby suggesting these species evolved from a common ancestor.

4-Comparative anatomy demonstrates physical and structural similarities between species. The species share anatomical similarities because they descend from a common ancestor (i.e., presence of homologies).

not sure if this is what you'r looking for eubacteria and archaebacteria

lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. so they expose rocks