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

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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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This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

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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..

Ploidy
Polyploidy

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

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Amphibians & Early Reptiles

Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..