Origin of Life on Earth

What is the proposed origin of mitochondria and plastids?

What event is associated with the sudden appearance of fossils resembling modern animal phyla in the Cambrian period?

What marks the most widespread and diverse land animals including arthropods and tetrapods?

When did the human lineage of tetrapods evolve?

What caused the extinction of many prokaryotic groups that could NOT adapt to increased atmospheric O2 levels?

What is a common characteristic shared by mitochondria and plastids as evidence of the endosymbiotic theory?

What is the proposed age of the oldest fossils of eukaryotic cells?

What process caused the accumulation of oxygen in the atmosphere from about 2.7 to 2.4 billion years ago?

What is the driving force behind the Cambrian explosion?

What is the significance of the endosymbiont theory in the evolution of eukaryotic cells?

What event can open habitats that may result in adaptive radiation?

Prokaryotes were Earth’s sole inhabitants for more than 1.5 billion years.

The rise of oxygen in the atmosphere from about 2.7 to 2.4 billion years ago caused the 'oxygen revolution'.

The Cambrian explosion refers to the sudden appearance of fossils resembling modern plant phyla.