Respuesta :
Answer:
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Explanation:
It allows the process of respiration to occur. For humans we inhale oxygen and exhale carbon dioxide. For the flatworm it does the same it inhales oxygen and exhales carbon dioxide. Now for a fern since it is a plant it can not take in oxygen it can only release it. This happens through photosynthesis. It is where plants take in the carbon dioxide and release oxygen.
Oxygen helps the organism to grow, reproduce and get energy from the food through cellular respiration.
Human inhale oxygen and exhale carbon dioxide through the process of respiration.
Flatworm also take up oxygen and release carbon dioxide.
Fern being a plant, takes up carbon dioxide to perform photosynthesis and release oxygen as a byproduct.
Why oxygen is important?
Animal requires oxygen for the growth and reproduction as cells die in absence of oxygen.
To get energy from food, oxygen is requires as a terminal electron acceptor for cellular respiration.
To know more about oxygen :
https://brainly.com/question/8900330
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