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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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Human Reproduction

Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

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In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..

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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..