#Question id: 5027
#Unit 9. Evolution & Diversity of Life Forms
Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?
1. Protostomes invade terrestrial environments.
2. Cambrian explosion occurs.
3. Deuterostomes invade terrestrial environments.
4. Vertebrates become top predators in the seas.
#Question id: 5028
#Unit 9. Evolution & Diversity of Life Forms
What is the probable sequence in which the following clades of animals originated, from earliest to most recent?
1. tetrapods
2. vertebrates
3. deuterostomes
4. amniotes
5. bilaterians
#Question id: 5029
#Unit 9. Evolution & Diversity of Life Forms
Which of the following was the least likely factor causing the Cambrian explosion?
#Question id: 5030
#Unit 9. Evolution & Diversity of Life Forms
There is evidence that ray-finned fishes originally evolved
#Question id: 5031
#Unit 9. Evolution & Diversity of Life Forms
Which era is known as the ʺage of reptilesʺ?
#Question id: 5032
#Unit 9. Evolution & Diversity of Life Forms
There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept is most applicable in this example?