Relate environmental factors to their possible effect on gene and chromosome expression in an organism. Describe mutations that affect genes. Research and report on a gene mutation. Investigate and debate the social, environmental and economic implications of genetic technologies. The basic idea of biological evolution is that Earth s present day species developed from earlier distinctly different species.
Evolution builds on what already exists.
Evolutionary change can be compared to the growth of a tree. Some branches survive with little or no change some die out altogether while others branch repeatedly giving rise to greater diversity of species. Classification schemes are tools to help us organize and understand relationships among organisms. Cite evidence for biological evolution. Explain how the fossil record provides evidence that organisms have changed over time.