1. Which system works with the circulatory system to get nutrients delivered to the body's cells? respiratory excretory nervous digestive

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.

How does the carbon cycle involve an exchange of carbon

Choose the diagram that best represents a habitat corridor explain your choice.