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This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..
A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..
Bryophytes are a plant group characterized by being nonvascular. They include the mosses, the liverworts, and the hornwo..