Answer: cellular report occurs in the respiratory system or the lungs and nasal cavity
explanation: it happens because when we intake oxygen, it reacts with glucose present in our body. this reaction gives out carbon dioxide, water and energy as products.
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The first one is the 3rd option and the 2nd one is also the 3rd option
What is this animal and i can answer it
Answer:
Homologous structures provide evidence for common ancestry
Fossil fuel was non existent 2.5 billion years ago