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Secondary - Biological Science

In a laboratory experiment design to demonstrate one aspect of photosynthesis, three test tubes were treated as shown above. The test tubes were then placed under a bright lamp for 24 hours. Which of the following is the best explanation for the observed color change in tube 2?

The light plant produce oxygen during photosynthesis which caused the color change
The aquatic plant produced carbon dioxide, which change into carbonic acid and caused color change.
The light bleached the solution from its original color of yellow to blue
The aquatic plant used carbon dioxide, raising the pH of the solution

Answer: The aquatic plant produced carbon dioxide, which change into carbonic acid and caused color change.

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Board Exam Reviewers with Random Questions

LET Reviewers

Secondary - Biological Science