Change
An alteration; in pathology, structural alteration of which the cause and significance is uncertain.
Synonym: shift.
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This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorphisms, temperature-sensitive mutations, indels, trinucleotide repeat expansions, and gene duplication...
Homeostatic Mechanisms and Cellular Communication
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory responses performed by homeostatic control systems. Know the different components of homeostatic control systems, homeostatic regulators, and the various biological processes that homeostasis entail...
Respiration
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides details of the different parts and functions of the respiratory system...
Animal Water Regulation
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understand how animals adapt to their habitat. For instance, how animals thrive in aquatic habitat and are able to overcome osmosis. It also sheds light on the reasons animals adapt...
Fish
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...
Early Mammals on Earth
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms, such as mammals, could fit into. Eventually, every continent of the planet had its own variety of mammalian organisms and their own unique evolutionary chain and direction. Learn more about the early mammals that roamed the Earth alongside other organisms, such as reptiles, fish, and birds...