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This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

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Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

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A Balanced Diet – Minerals and Proteins

Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..

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Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

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