A Brief History of Life: Survival Is Hard

What was the primary composition of Earth's atmosphere during the Archean Eon?

• Methane, ammonia, hydrogen, and carbon dioxide

• Sulfur dioxide and argon

• Oxygen and nitrogen

• Helium and neon

Which hypothesis suggests that RNA was the first genetic material?

• DNA world hypothesis

• Protein world hypothesis

• RNA world hypothesis

• Lipid world hypothesis

What is the name of the ancient life form that ruled Earth for about 3 billion years?

• Ammonites

• Trilobites

• Stromatolites

• Dinosaurs

What significant event did cyanobacteria contribute to during the Proterozoic Eon?

• The Great Oxidation Event

• The formation of the ozone layer

• The Late Heavy Bombardment

• The Cambrian Explosion

Which type of bacteria is known for its ability to perform photosynthesis?

• E. coli

• Lactobacillus

• Staphylococcus

• Cyanobacteria

What is the process called when a larger cell engulfs a smaller cell, leading to a symbiotic relationship?

• Photosynthesis

• Mitosis

• Endosymbiosis

• Meiosis

What is the primary function of mitochondria in eukaryotic cells?

• DNA replication

• Protein synthesis

• Energy production

• Photosynthesis