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Stems

Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

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Seed Plants

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

Origins of Life on Earth
Origins of Life on Earth

Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

Body temperature regulation by the hypothalamus
Temperature Regulation in Animals

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

Oligodendrocyte and Schwann cell
The Central Nervous System

Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..

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Vascular Plants: Ferns and Relatives

Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..