4. What is an electron transport chain? What is its role during these light reactions? 5. How is ATP made during light reactions?

4: An electron transport chain is are basically a series of (4) proteins that creating an electrochemical gradient. ATP is made during this process.

5: ATP is a product of cellular respiration in the mitochondria. Aerobic respiration produces ATP.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.