Two items of the same kind.
Dictionary > Couplet
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Muscle
Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..
Sensory Systems
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..
Independent Assortment and Crossing Over
This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..
Darwin and Natural Selection
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
Non-Mendelian Inheritance
In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..
Consciousness and Behavior
Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..