Where are hydrogen bonds located in the nucleotides?

Select all the true statements about the cosmic microwave background radiation

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.

Describe two recent or ongoing space missions.