Question

a scientific theory that seeks to understand relationships between all organisms, both alive and dead is

Answer 1

This helps scientists to test hypotheses and find out how things happens. Hypotheses are proposed answers to a scientific question, while theories are proposed answer to a wide range of observations and experiments supported by evidence. They use these to see if any patterns are formed and then analyze the data to form a hypothesis to what might have happened.

Answer 2

Evolution

Step-by-step explanation:

Evolutionary studies are very essential in understanding the relationship between a species in present time and its ancestors. The fossils derived from various researches help scientist to understand how a specific organism has evolved with the changing environment conditions.

Evolutionary studies link the morphology, anatomy and physiology of any living organism with its ancestors to understand the circumstances under which these changes have occurred and also predict how further changes will occur in near by future.