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Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

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Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

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Roots

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

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The Dinosaurs

Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

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Early Mammals on Earth

The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

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Temperature Regulation in Animals

This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..