Answer:
two carbon atom and six hydrogen atoms join together to form ethane.
Explanation:
Which scientist developed the idea that microorganisms can cause diseases? Paul Ehrlich
Answer:
o2
Explanation:
Oxygen expelled by plants enters the air to be inhaled by animals and aerobic bacteria. Animal cells use oxygen for a process called oxidation.
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Viruses and bacteria infect cells by hijackingreceptors<span> on their surface.</span>