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This laboratory activity helps learners understand the concept of biological succession by simulating the process in a microenvironment with various protozoans.

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

In this activity, learners are challenged to eat some candy as a cell would need to as well as to think about some of the problems that arise when a cell ingests food.