What is one disadvantage of light microscope

What type of specimens where you able to see under each of the microscopes in the microscope activity

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).