Exploring the Wonders of Biology and Ecology

How long ago did Earth form?

• 2.5 billion years ago

• 4.6 billion years ago

• 4.4 billion years ago

• 3.5 billion years ago

What was probably the first genetic material?

• DNA

• RNA

• Lipids

• Proteins

What event caused a significant increase in atmospheric oxygen?

• Cambrian Explosion

• Oxygen Revolution

• Permian-Triassic Extinction Event

• Formation of Pangaea

Which era is known for the 'Cambrian Explosion'?

• Phanerozoic

• Mesozoic

• Proterozoic

• Archaean

What are eukaryotes?

• Single-celled organisms with no nuclei

• Organisms including all plants and animals

• The first living things on Earth

• Organisms that can perform photosynthesis

What likely caused the Permian-Triassic Extinction Event?

• The emergence of mammals

• A global pandemic

• A supernova explosion

• An asteroid impact

What did cyanobacteria use to produce oxygen?

• Chemosynthesis

• Fermentation

• Respiration

• Photosynthesis

What period did tetrapods first appear?

• Carboniferous

• Ordovician

• Cambrian

• Devonian

What was the atmosphere's oxygen percentage during the Carboniferous Period?

• 21%

• 50%

• 10%

• 35%

What major event allowed dinosaurs to evolve?

• The invention of photosynthesis

• The development of multicellular life

• The formation of the moon

• The Permian-Triassic Extinction Event