Pretty sure it's all of the above
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Hello!
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❖ Before mitosis and meiosis occur, DNA replication has to occur. DNA replication is when another copy is made of the DNA and in mitosis and meiosis, you need the replicated DNA for the sister chromatids.
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circle graph is my best answer answer hope it is helpful
The answer is D, photosynthesis and respiration.
—Evidence—
Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration.
Oxygen gives our cells the ability to break down food in order to get the energy we need to survive. Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration.
