Naturism

Muscle

Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

Fish

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

Still Water Animals

Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

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Mammalian Ancestors

Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..