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Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

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Primitive Animals

Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

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Plant Tissues

Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

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Fish

The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

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Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

Bryophytes
Bryophytes

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