Marine Science Chapter 3 Notes

Evidence that life began in the oceans is based on

• the fossil record
• there was no pollution at that time
• oxygen levels found there
• the diversity of life forms that exists there

Imprints of plant and animal remains in rock layers are called

• mitochondria
• mutations
• fossils
• stromatolites

______ is important to life because mitochondria can create more energy by processing it.

• carbon dioxide
• nitrogen
• oxygen
• ozone

Early Earth's atmosphere was mostly

• oxygen
• nitrogen
• ozone
• carbon dioxide

The earliest life on Earth

• was cyanobacteria
• did not use oxygen
• is preserved as stromatolites
• All of these are correct

Earth's oceans formed

• when the Moon was formed
• after Earth's surface cooled
• after the atmosphere formed
• when life first appeared

Life on Earth could ony form 

• after the oceans were formed
• after plants grew in the oceans
• after the Moon was formed
• after the planet warmed uo

The process of mutation allows

• organisms to breathe oxygen
• organisms to achieve a survival advantage
• the process of natural slection to work
• 2 of these are correct

A(n) _________ is an organism that relies on consuming chemical compounds for energy.

• autotroph
• heterotroph
• mitochondria
• mutation

A(n) __________ is an organism capable of producing oxygen.

• autotroph
• heterotroph
• mutation
• mitochondria