Photosynthesis releases oxygen<span> into the atmosphere and cellular respiration uses the </span>oxygen<span> to </span>release energy from food<span>. The </span>process that releases energy from food molecules by producing ATP in the absence of oxygen<span>.</span>
I'd say first question, "life changes over time".
Second question, "when there are physical similarities in the early stages of embryonic development, it suggests that each of the modern organisms once had a common ancestor".
Third, appendix.
Fourth, "they are evidence that all came from a common ancestor and that life changed over time for all these organisms to exist".
Fifth, "they all share at least 50% of the same DNA arrangement".
I might be a little late but hopefully this helps!
<span>B. Social interaction. Highly populated areas bring together people from all walks of life and due to circumstance these people end up relating with each other on one level or another. In most cases people living in highly populated areas will end up becoming friends over a long period of time as it is likely that members of their families may end up going to the same schools or work in the same areas.</span>
The answer u r looking for is- chemical reaction. ;)
B. Warm air rises and takes heat with it; eventually it cools and sinks