The main difference between relative dating and absolute dating is that relative dating determines which of two fossils is older or younger than the other and absolute dating determines about how long ago a fossil organism lived.
absolute dating determines which of two fossils is older or younger than the other and relative dating determines about how long ago a fossil organism lived.
relative dating determines when an organism lived and absolute dating determines about how long ago a fossil lived.
relative dating determines about how long ago a fossil lived and absolute dating determines when an organism lived.
During the early years of the planet, Earth
eventually formed an atmosphere that had little oxygen.
was molten and lacked an atmosphere and oceans.
formed a solid crust as the planet cooled.
all of the above
The RNA world hypothesis states that RNA may have been the first organic molecule to evolve because
RNA is less complex than DNA so it must have evolved first.
RNA is needed for both transcription and translation.
RNA can encode genetic instructions and some can carry out chemical reactions.
nucleotides evolved before amino acids.
The geologic time scale divides Earth’s history into divisions that are based on major changes in
climate.
geology.
evolution.
all of the above.
LUCA
probably existed around 3.5 million years ago.
was one of the earliest eukaryotic cells.
gave rise to all subsequent life on Earth.
all of the above
The endosymbiotic theory
explains how eukaryotic cells evolved.
explains how prokaryotic cells evolved.
explains how the first cells evolved.
explains how bacteria evolved.
The first cells may have been
lipid membranes around DNA.
lipid membranes around RNA.
lipid membranes around DNA and RNA.
lipid membranes around proteins and RNA.
DNA sequence comparison demonstrates that humans are most closely related to
insects.
birds.
rodents.
apes.
Miller and Urey demonstrated that organic molecules could form under simulated conditions on early Earth.
It is thought that one early cell gave rise to all subsequent life on Earth. That one cell is called the .
The early atmosphere contained ammonia, methane, water vapor, and carbon dioxide, but only a small amount of .
The first eukaryotic cells probably evolved about billion years ago.
Short Answer
Answer each question in the space provided.
Explain how eukaryotes are thought to have evolved.

Outline how the first organic molecules arose.