To find the distance between two points A and B that are opposite sides of a river

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

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.

Which of the following was a characteristic of a dromaeosaur? modified front claw grasping with their forelimbs both a and b none of the above