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Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

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Growth and Plant Hormones

Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..

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Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..