The definition of an adaptation is a change or adjustment to improve something, or to make it suitable to a different situation. A wheelchair ramp built into a mini van is an example of an adaptation.
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Answer:in the human body an organ needs an organ system because 1. if there isnt any other organs that organ would either not work or just sit there and slowly deteriate 2. all organs help each other by providing oxygen,blood, and protein
Explanation:im sorry if that is not the answer on what you are doing but thats the best i can do with the informatio i had
Answer: the answer is D
Explanation: because i said so
Explanation:
Primordial organisms did not require oxygen for respiration as is the case with most organisms case today. These organisms were and are still mainly anaerobic. They main form of cellular respiration is glycolysis that does not utilize oxygen. Since other organisms evolved from the primordial cells, it is deduced that the early atmosphere was not mainly composed of oxygen but mainly carbon dioxide.
In today’s aerobic cells oxygen is utilized in the Krebs cycle as a proton acceptor making cellular respiration even more efficient in the production of energy. Remember that, utlimately, organisms evolve to fit into their environment.
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I would say d,c sorry if im wrong