Jacob found a caterpillar in his backyard. He watches the caterpillar every day and writes his observations as the caterpillar goes through metamorphosis. Why is this
NOT considered an experiment?

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 coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii