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

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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..

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This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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Still Water Animals

Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

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Leaves

Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..