PLSC Fall 2025 courses PLSC Course DescriptionsSPSS Course SpotlightSPSS Spring 2025 coursesPLSC Fall 2025 courses PLSC Fall 2025 courses PLSC 3998 3998. Variable Topics in Plant Science 3.00 credits | May be repeated for credit. Prerequisites: None. Grading Basis: Graded Topics and credits to be published prior to the registration period preceding the semester offerings. May be repeated with a change in content. Formerly offered as SPSS 3998.