Answer:
Heat is produced.
Explanation:
Law of conversation of energy and mass these can't be created or destroyed, but can be converted to another form. The fuel/chemical energy is being converted into heat.
Answer:
The scientist is studying oxygen which can also be found in protien. oxygen is the element which makes up to 65% of human body mass. It is also found in proteins inside the body.
I think is D,,,,,,,,,,,,,,,,,
They are homologous because they have similar structure regardless of purpose
Answer:
By eating things with protein in it. Sorry if this sounds too simple, but that's all it is.
