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Pretest: Energy Use and Organisms
12
Select the correct answer.
What's the role of oxygen in cellular respiration?
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It accepts electrons and keeps the electron transport chain running.
It breaks down carbon-based sugar molecules to release energy and forms carbon dioxide.
It combines with hydrogen ions in sugar molecules to release energy and form water.
It supplies electrons to the electron transport chain to keep it running.
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This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.

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That is false even though water expands when frozen nothing changes at all