Question

"Which statement best describes the method used above to determine the evolutionary relationships between three species of finches?

(1)Examine the structure of the beaks and compare them.
(2)Observe behavioral and physical characteristics of all the finches and group them by similarities.
(3)Obtain molecular evidence from all three species and identify similarities.
(4)Compare common ancestors of all three of the species to see if they are the same."

Answer 1

The statement that best describes the gel electrophoresis method used to determine the evolutionary relationships between three species of finches is 3. Obtain molecular evidence from all three species and identify similarities.

Why is this correct?

In exploring evolutionary connections, gel electrophoresis serves to analyze molecular markers like DNA sequences or protein profiles across various species.

This method enables the comparison of these molecular characteristics, allowing scientists to discern similarities or disparities in genetic or protein compositions among species. Such comparisons assist in evaluating and understanding the evolutionary relationships between these organisms.

Answer 2

The method used above involves the determination and comparison of the genes of the three species of finches. So, the answer is
(3) Obtain molecular evidence from all three species and identify similarities.
The genetic makeup of the three species will show different similarities that can be used to relate the evolution of the different species.