How does human respiration contribute to the water cycle?
(please put a real answer)

Where substance is produced during cellular respiration

Which feature of a human community is similar to a niche in a biological community

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes