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The Human Nervous System
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..
Geological Periods
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
Developmental Biology
Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..
Meiosis and Alternation of Generations
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..
Cell Structure
A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..
The Water Cycle
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..