Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presumed to look a lot like the reptiles. As they continued to evolve, many of them became bigger and stronger. Read more about the evolution of dinosaurs and their subsequent extinction in this tutorial...
The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over 20 000 species of fish, all of which have diversified over time. In this tutorial, the different factors that helped shape fish as we know them today are presented...
Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you've learned about earlier to learn more about the possible impacts of natural and human-induced environmental changes...
The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell", came about. This tutorial speaks of the evolution of organelles, their diversity, and similarity...
There are more species of insects than any other species combined. This surely illustrates that insects have the selective advantages that allow them to take the most advantage of the environment that they live in. Read more about the evolution of insects in this tutorial. Find out the reasons as to why insects enjoyed their continued existence over such a long period of time...
Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and decomposers. Read this tutorial to learn about each of them and their role in a freshwater ecosystem...