Q: What is essential for cellular respiration for all aerobic organisms?


Read this paragraph and choose the correct option from the provided answers:

An online guide from the University of Illinois about air masses and fronts is found here: http://ww2010. atmos. uiuc. edu/%28Gh%29/guides/mtr/af/home. rxml .

 Choices:

- nitrogen

- water

- carbon

- oxygen


A:
oxygen