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This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..

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Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

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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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For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

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If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..