Pleasanton High School

Debra Rzeznik » Home


Biology is the study of life and living organisms, from the smallest bacteria to giant sequoias. Biologists use observation and experimentation to gain an understanding about the natural world. Branches of biology include anatomy, biotechnology, botany, cell biology, ecology, genetics, medicine, microbiology, molecular biology, and zoology. Many people entering the field of biology become specialized in a particular area.

As a course, biology encompasses four main themes:

1. The process of evolution drives the diversity and unity of life
2. Biological systems utilize free energy to grow, reproduce, and maintain life functions
3. Living systems store and transmit information essential to life processes
4. Biological systems interact with each other, and those interactions possess complex properties.

I am looking forward to an exciting year. If you would like to set up a conference, please email me at If you do not have email access, please feel free to call the High School front office at 830 569-1250. My conference is 6th period from 1:15 - 2:05.

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