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Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

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This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

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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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ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

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Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..

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In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..