Ch 14 History of Life Quiz

A(n) ____ is a scientist who studies fossils.

• paleontologist

• ecologist

• botanist

• zoologist

Early cyanobacteria produced ____ which eventually formed the ozone layer.

• hydrogen

• proteins

• carbon dioxide

• oxygen

Look at this graph indicating carbon-14 decay. What is significant about the point in which C-14 has decayed 5730 years?

• This is called the half-life.

• Total decay has occurred.

• Eighty percent decay has occurred.

• This is called the quarter-life.

Many scientists consider ____ to be the first cellular coding system.

• meiosis

• photosynthesis

• RNA

• complex proteins

The ____ era began with Cambrian explosion and ended with a mass extinction.

• Cambrian

• Paleozoic

• Mesozoic

• Cenozoic

This shows that ____ helped amino acids stabilize.

• oxygen

• proteins

• clay

• hydrogen

What resulted from the experiment shown here?

• Flies appeared in closed containers.

• Theory of biogenesis disproved.

• Spontaneous generation was disproved.

• Spontaneous generation was confirmed.

The ____ era began with Cambrian explosion and ended with a mass extinction.

• Cambrian

• Paleozoic

• Mesozoic

• Cenozoic

What modern cells do scientists believe to be close relatives of the Earth's first cells?

• archea

• amino acids

• eukaryotes

• proteins

What theory suggests the important relationship between ancestral eukaryotic and prokaryotic cells?

• spontaneous generation

• early cellular theory

• prokaryotic theory

• endosymbiont theory