Photic Zone

This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

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

Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

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