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Reading Levels These books contain three developmentally appropriate reading levels for each grade span.

Low
Mid
High

Each level of the book conveys similar concepts, images, and vocabulary.

Plant Life

© Okea/iStock/Thinkstock

Plant Life

Our world is full of plants. Most plants have certain parts and attributes in common. There is also amazing diversity within the plant kingdom. This unit helps students understand the parts of plants and the functions of those parts. It explains photosynthesis as the process by which plants make their own food. It also explains how and why plants reproduce and grow, including the processes of pollination, fertilization, seed dispersal, and germination. The unit explains some of the key relationships between plants and animals. It also describes some of the many ways people use plants for both food and materials.

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