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We begin at the level of organisms, delving into the many processes and structures, at scales ranging from components as small as individual atoms to organ systems that are necessary for life to be sustained.Our focus then broadens to consider organisms in their environment—how they interact with the environment’s living (biotic) and physical (abiotic) features.Yet what is learned about the function of a gene or a cell or a process in one organism is relevant to other organisms because of their ecological interactions and evolutionary relatedness.Evolution and its underlying genetic mechanisms of inheritance and variability are key to understanding both the unity and the diversity of life on Earth.It examines processes that occur on time scales from the blink of an eye to those that happen over billions of years. Although living organisms respond to the physical environment or geosphere, they have also fundamentally changed Earth over evolutionary time.Rapid advances in life sciences are helping to provide biological solutions to societal problems related to food, energy, health, and environment.This idea explains the mechanisms of genetic inheritance and describes the environmental and genetic causes of gene mutation and the alteration of gene expression.The fourth core idea, LS4: Biological Evolution: Unity and Diversity, explores “changes in the traits of populations of organisms over time”  and the factors that account for species’ unity and diversity alike.
The second core idea, LS2: Ecosystems: Interactions, Energy, and Dynamics, explores organisms’ interactions with each other and their physical environment.For many centuries it was used as a pigment for glass.Now it is used as a fuel in nuclear reactors and in nuclear bombs. Accessed on-line: 2/25/2018https://Environmental Chemistry.com/yogi/periodic/ If you would like to link to this page from your website, blog, etc., copy and paste this link code (in red) and modify it to suit your needs:echo Periodic Table of Elements: Uranium - U (Environmental Chemistry.com)- Comprehensive information for the element Uranium - U is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions..Evolution also accounts for the remarkable similarity of the fundamental characteristics of all species.The first core idea, LS1: From Molecules to Organisms: Structures and Processes, addresses how individual organisms are configured and how these structures function to support life, growth, behavior, and reproduction.
The committee developed four core ideas reflecting unifying principles in life sciences.