Which of the following statements best describes the relationship between adaptations

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.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

What are some characteristics of a free enterprise economy?