Species C is the ancestor of species B.
Species D and E evolved from species B.
Species X evolved later than species D but before species B.
Both species C and species D are related to species X.
Snails appeared on Earth before corals.
Sponges were the last new species to appear on Earth.
Earthworms and sea stars have a common ancestor.
Insects are more complex than mammals.
Methods of reproduction
Number of their ATP molecules
Sequences in their DNA molecules
Structure of protein molecules present
They have similar base sequences.
They have similar fur color.
They inhabit the same geographic regions.
They occupy the same niche.
Many of the descendants of organism B became extinct
Organism B was probably much larger than any of the other organisms represented
Most of the descendants of organism B successfully adapted to their environment and have survived to the present time
The letters above organism B represent members of a single large population with much biodiversity
All evolutionary pathways show that life began with autotrophic organisms that soon evolved into heterotrophic organisms.
Two organisms on the same branch of an evolutionary pathway are more closely related to each other than to those on distant branches.
All the organisms shown at the ends of evolutionary pathway branch tips are alive today.
Evolutionary pathways show that evolution is a short-term process.
Evolution always results in favorable traits.
Evolution does not always result in a species that will survive to present time.
Evolution leads to less complex organisms.
Evolution results in the same changes in all species.
Species B and C can be found in today's environments.
Species A and D evolved from E.
Species A and C can still interbreed.
Species A, B, and E all evolved from a common ancestor and all are successful today.