Why is it necessary to study how living things work at so many different levels of organization?

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

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).