Deep History of Life on Earth (HHMI)

What was the only life present during early Earth?

• microbial
• small multicellular
• plant

What allowed larger, more complex life to form during ancient Earth?

• oxygen in the oceans and atmosphere
• carbon dioxide increased in the atmosphere
• high energy, inorganic compounds

Tags

NGSS.HS-ESS2-7

NGSS.HS-LS4-2

Scientists have constructed a timeline of life on Earth based on:

• geological evidence
• genetic evidence
• astronomical evidence
• two answers are correct

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

What process has destroyed most fossils that probably have formed over the millions of years of Earth history?

• plate tectonics
• earthquakes
• hurricanes
• tsunamis 

Fossils form in which type of rock?

• sedimentary
• igneous
• metamorphic

Which has the lower concentration of the carbon-13 isotope?

• Organic molecules
• Inorganic molecules

Which is NOT a piece of evidence for ancient life on Earth?

• stromatolites
• banded iron formations
• isotopic ratios resulting from biological processess
• the presence of Earth's atmosphere

Tags

NGSS.HS-LS4-1

Which type of biomolecule tends to be the most well preserved?

• Lipids like cholesterol
• Carbohydrates like glucose
• Nucleic acids like adenine
• Proteins like the amino acid proline

When did the great oxygenation event occur in Earth's history?

• 2400-1400 million years ago
• 240-140 million years ago
• 24-14 million years ago
• 2.4-1.4 million years ago

Tags

NGSS.HS-LS2-5

What is the hallmark of eukaryotes?

• organelles
• DNA
• cell membrane (phospholipid bilayer)
• ribosomes