Summarize the causes and effects of health in space

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.

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

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