<span>Complete the sentence below by selecting the correct words from the drop-down menus.
There are three requirements for natural selection. The requirements are </span><span>✔ variationsimilarity</span><span>, <span>underpopulation✔ overpopulation</span><span>, and <span>✔ adaptationextinction</span><span>.</span></span></span>
Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into ATP (adenosine triphosphate), and then release waste products. <span>There are </span>3 major<span> steps in </span>cell respiration:<span> glycolysis, Krebs Cycle, and the electron transport chain.</span>
Answer: oxygen is present; electron transport chain is used
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Mitochondria are double membrane bound cytoplasmic organelles present in most eukaryotic cells. They are responsible for aerobic respiration.
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D.Most bilaterians have tissues but some do not.
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