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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

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Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

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Developmental Biology

Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..

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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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Human Reproduction and Fertilization

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

Physiological Homeostasis
Physiological Homeostasis

Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..