11 Questions
What characteristic of eukaryotic cells contributed to their ability to evolve greater morphological diversity?
Complexity
What event in the fossil record saw the emergence of the first large, hard-bodied animals?
The Cambrian explosion
What is the approximate time period when fossil evidence suggests that some prokaryotes lived on terrestrial surfaces?
3.2 billion years ago
Which group of organisms are the most widespread and diverse land animals?
Arthropods
What type of single-celled eukaryotes gave rise to multicellular forms?
Plants and animals
What is the estimated number of species on Earth?
10 million - 100 million
What was the condition on early Earth that made the origin of life possible?
The end of the earth's bombardment with chunks of the solar system
What are the three eras of life's history?
Paleozoic, Mesozoic, and Cenozoic
What was the role of the first single-celled organisms?
To carry out energy processing and metabolism
What was the result of the evolution of oxygenic photosynthesis?
The production of oxygen that dissolved in water
What is the process by which eukaryotes originated?
Endosymbiosis
Explore the origin of life on Earth, from the early conditions that made it possible to the key events in life's history, including the three eras of the Paleozoic, Mesozoic, and Cenozoic.
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