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Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

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Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

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Birth of a Human Baby

Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

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The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

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This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..