Biology, Pages 58-67
Biology in clear, easy-to-read language
Biology is a comprehensive life science program for your reluctant readers and those who require additional help to grasp basic biological and life science concepts. This full-color, easy-to-read textbook addresses all these needs.
Written to meet national guidelines, students learn about classification and organization; patterns of reproduction, growth, and development; the human body's systems; ecological cycles; and other basic biological building blocks.
Lexile Level 840 Reading Level 3-4 Interest Level 6-12
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Since the dawn of human history , people have used other organisms as sources
of valued substances — from foods to medicines and fabrics . The science of
organic chemistry originated in attempts to purify and improve the yield of such ...
These compounds A are male and female sex hormones , o ) respectively , in
humans and other291 vertebrates ( Figure 4.9 ) . Both are om steroids , organic
molecules with a common carbon skeleton in the form of four fused rings . These