Question

The independent evolution of flora and fauna in different regions of the world was primarily caused by:

Options

• The absence of any environmental differences between regions

• Isolation of continents by seas and barriers

• Continuous gene flow between all continents

• Uniform climatic conditions across the globe

Answer 1

Isolation of continents by seas and barriers caused the independent evolution of flora and fauna in different regions. With no mixing between realms, each region's species evolved along separate evolutionary lines.