Which bond type has the lowest risk of default?

What are four key elements of the study of economics?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

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.