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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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Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

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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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Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

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The Origins of Life

This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

Early Mammals on Earth
Early Mammals on Earth

The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..