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The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

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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 movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

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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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This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

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Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..