Explain the importance of maintaining a controlled experiment?

You need to have a fair test on an experiment and do the experiment over and over again

When you have too many variables, it is almost impossible to single out why your dependent variable changed. If in one trial, the temperature surrounding the plant is 34° and in the second trial the temperature is 54° your data will be different each time even if all of the other variables the same

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.