Carbon cycle contains an important stage called Carbon fixation. This
stage - Carbon fixation changes carbon dioxide into organic compound
such as glucose. Which of the following organisms cannot fix carbon? *
1. grass
2. maple trees
3. algae
4. mushrooms

Fungi(mushrooms) are heterotrophs and they cannot fix nitrogen from the atmosphere and they must obtain it from their environment. They are using complex organic compounds as a source of carbon.

Most plants can fix carbon which are 1. Grass 2. Maple trees 3. Algae and hat are why they are incorrect answers because from this question only 4. mushrooms can fix carbon.

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Carbon cycle contains an important stage called Carbon fixation. This stage - Carbon fixation changes carbon dioxide into organic compound such as glucose. Which of the following organisms cannot fix carbon? * 1. grass 2. maple trees 3. algae 4. mushrooms

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Carbon cycle contains an important stage called Carbon fixation. This
stage - Carbon fixation changes carbon dioxide into organic compound
such as glucose. Which of the following organisms cannot fix carbon? *
1. grass
2. maple trees
3. algae
4. mushrooms