5 Questions
What is the fundamental unit of life?
Cells
Which theme in biology explains the unity and diversity of life?
Evolution
At what level of organization do biologists study the molecular biology of a cell?
Cellular level
What is the main method used by biologists to make observations and form conclusions?
Scientific method
When did life on Earth emerge, according to the passage?
3.7 billion years ago
Test your knowledge of fundamental biological principles and themes such as cells, genetics, evolution, and energy processing. Explore the unifying concepts that make biology a coherent field of study.
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