How many hydrogen bonds connect to all nitrogen bases? 30 !

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.

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat