Explains how chloroplasts evolved into their present form, how photosynthesis takes place in them, where they are found in plants, physical characteristics, and other functions they perform.

Describes how sperm cells are formed through the process of spermatogenesis and some factors that can negatively affect sperm formation.

[Free Registration/Login may be required to access all resource tools.] This activity covers the structure and function of carbohydrates. Students will learn about the different types of complex carbohydrates and how they are formed.