What is the role of RNA polymerase

Which is required for sexual fissiondiploid cell productionmeiosis

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

What are some possible short and long term medical concerns for crew members on longer space exploration trips