This is a lab that is designed to:
-Learn basics about seed structure and function
-Understand difference between monocot and dicots
-Practice with microscope/stereomicroscope
-Use of Biological Indicator (Iodine/Lugol's solution)
This serves as a good AP Bio lab or botany activity. The lab describes the structure and function of the sunflower seed and germination through text and diagrams (some of which have blanks to fill in.) Students use a scalpel to cut a seed in half and look at the internal structures. The last section of lab is the basic starch test with iodine. The iodine will turn much of the testa and endosperm black if starch is present allowing students to understand how some indicator solutions are used in 21st century biology and also as a reference to spotting the "fuel source" for growing plant embryos. I have done this lab with my class for the past couple years and it seems to work pretty well and provides high school students with experience I feel needed more in the high school Bio classroom.