The direction of the reaction.
The reason why humming birds need long beaks is to be able to get the nectar from the flowers, kind of like how we need straws to drink out of to go cups. Humming birds also have very long tongues that also help this process. Since humming birds beaks help them get the food they need, it makes them more successful in their environment.
Autosomal recessive inheritance: two unaffected people who each carry one copy of mutated gene for and autosomal recessive disorder (carriers) have a 25% chance with each pregnancy of having a child affected by the disorder.
Photosynthesis and cellular respiration are related in that; photosynthesis is a process that is tasked in making glucose which is then used in cellular respiration to make ATP. The glucose is then converted to carbon dioxide during cellular respiration, which is used in photosynthesis. Water on the other hand is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
