Explain an important thing to remember as you turn the high power objective into place

As you turn the high power objective of a microscope into place, you should remember that it is retractable and will slid inside if you hit the slide. So, precautions must be taken to ensure that you did not hit the slide in the process of observing the specimen. 

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.