How would the amount of carbon dioxide in the atmosphere change if there were no plants?
1. No change
2. It would increase
3. It would decrease

it would increase

Explanation:

plants take in carbon dioxide and give oxygen

1) It would increase

This would because plants make photosynthesis wich coverst carbon dioxide into oxygen. Whithout plants, there would be no oxygen; no clean air for humans to breath.

Explanation:

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.