Which of the Following Could Provide an Explanation for the Rapid

question 12

Multiple Choice

Which of the following could provide an explanation for the rapid increase in oxygen levels ~2.5 billion years ago?

• A)Sedimentation rates were constant, photosynthetic rates did not change, and respiration rates decreased.
• B)Sedimentation rates increased, photosynthesis rates increased, and respiration rates were low.
• C)Sedimentation rates increased, photosynthetic rates increased, and respiration rates increased.
• D)Sedimentation rates increased, photosynthetic rates remained constant, and respiration rates were low.

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Definitions:

Habitat Loss

The destruction or degradation of natural environments, leading to the decline of plant and animal species.

Pollution

The introduction of contaminants into the natural environment causing adverse change, through substances or energy.

Non-native Species

Species that are introduced into an environment where they do not naturally occur, often causing harm to local ecosystems and species.

Mutualism

A type of symbiotic relationship between two organisms where both organisms benefit from the interaction.