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Question

Difficulty: EasyEcology and Environment

In a forest ecosystem, trees and other green plants actively cycle gases through the atmosphere. Which biological process allows these plants to remove carbon dioxide directly from the air?

  1. A
    Cellular respiration
  2. PhotosynthesisAnswer
  3. C
    Transpiration
  4. D
    Decomposition

Answer

Photosynthesis
Photosynthesis is the fundamental ecological process by which producers capture solar energy to convert atmospheric carbon dioxide and water into glucose and oxygen, thereby removing carbon dioxide from the surrounding air.

Step-by-Step Solution

1
Identify the gas being removed from the atmosphere in the question.
The target gas is carbon dioxide (CO2CO_2).
The question asks specifically for the mechanism by which autotrophs absorb carbon dioxide.
2
Evaluate the primary gas-exchange role of each listed biological process in plants.
Photosynthesis consumes CO2CO_2 and water to synthesize glucose, whereas cellular respiration releases CO2CO_2 and transpiration releases water vapor.
Determining inputs and outputs distinguishes carbon-fixing processes from carbon-releasing processes.

Key Concept

Carbon Cycle and Primary Productivity
Estimated Time:40s
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Topics

Ecology and Environment

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