Chapter 2 of 3
Living Organisms: Survival, Growth, and Inheritance
An organism is an individual living thing; in many-celled organisms, specialized cells cooperate as tissues, organs, and organ systems—groups of cells, structures, and cooperating structures that perform particular jobs. Explore homeostasis, the maintenance of relatively stable internal conditions, using a thermostat as an analogy. Then follow growth and reproduction through cell division and introduce DNA, the molecule that stores inherited information, and genes, sections of DNA that help determine biological traits.
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