Evidence that living things have evolved over hundreds of millions of years can be found in OPTIONS:
- particles in the air
- rocks containing fossils
- tree rings from recently logged trees
- chemicals in human hair
A: rocks containing fossils

Which process directly adds carbon into the atmosphere? OPTIONS:
- increasing plant populations
- decreasing animal populations
- burning fossil fuels
- forming sedimentary rock
A: burning fossil fuels

Vultures are scavengers that most likely help ecosystems by quickly consuming dead organisms and OPTIONS:
- speeding up the process of decay.
- taking nonliving matter from the environment.
- slowing the spread of disease.
- helping to distribute seeds.
A: slowing the spread of disease.

Cells in the body use oxygen (O2) for cellular respiration. Which is the result of cellular respiration? OPTIONS:
- ATP is produced and carbon dioxide (CO2) is released.
- ATP is consumed and carbon dioxide (CO2) is released.
- ATP is produced and carbon dioxide (CO2) is absorbed.
- ATP is consumed and carbon dioxide (CO2) is absorbed.
A:
ATP is produced and carbon dioxide (CO2) is released.