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This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

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The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

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The Conscious & Unconscious Nervous System

This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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Early Mammals on Earth

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

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

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It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..