2. Enzymes can act as organic catalysts in living things. How do enzymes affect reaction rates in cells? A They slow down cellular reactions by inhibition.
B They speed up cellular reactions by providing a site for substrates to react.
C They speed up cellular reactions by providing energy to the reactants.
D They slow down cellular reactions by lowering the reaction temperature.​

explanation:

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.