Question

Directions: The diagram shows the carbon cycle. Use the diagram to answer any questions that follow.


Select all the ways carbon dioxide enters the atmosphere.
A.
human activities

B.
plants

C.
carbonification

D.
animals

E.
bacterial decomposers

Answers

Answered by GPT-4o mini
The correct options for how carbon dioxide enters the atmosphere are:

A. human activities
E. bacterial decomposers

Human activities, such as burning fossil fuels and deforestation, release carbon dioxide into the atmosphere. Additionally, bacterial decomposers break down organic matter, also releasing carbon dioxide as a byproduct of decomposition.

Plants (B) absorb carbon dioxide from the atmosphere during photosynthesis, while carbonification (C) refers to the process of forming carbon-rich substances, not a direct source of carbon emissions. Animals (D) also do not directly release carbon dioxide; they respire oxygen and release carbon dioxide as a byproduct, but they are not a primary source in the context of the carbon cycle.

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