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Bryophytes are a plant group characterized by being nonvascular. They include the mosses, the liverworts, and the hornwo..

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This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

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Running Water Freshwater Community Factors

This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

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Lights’ Effect on Growth

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

Pikas are an indicator species for climate change
Indicator Species and Endangered Species

Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..