Photosynthesis<span> makes the glucose that is used in </span>cellular respiration<span> to make ATP. The glucose is then turned back into carbon dioxide, which is used in </span>photosynthesis<span>. While water is broken down to form oxygen during </span>photosynthesis<span>, in </span>cellular respiration<span> oxygen is combined with hydrogen to form water.
~hope that helps</span>
Since parent of both Justin and his wife Brittany have blood group ab, this means Justin is homozygous(aa) for blood group a and similarly his his wife Brittany is also homozygous (bb) for blood group b. Therefore, Justin and Brittany's son Theodore will certainly have ab blood group.