lots of resources to explore here but I need more timeto dig around. The Carbon cycle is a click & read not a real simulation.
But I do think there is value in here, perhaps with the GMO stuff.
I have not tagged it to show on the website, I think I would find specific sites for this.
Things still to complete on this Cells Index page:
Introduction to units and size of cell part poster lesson.
Cell size screencast - shorter, into two separate ones.
Being multicellular - use fancy active studio or smart
Cell detective activity - perhaps use inthink quiz & pbl
Review and assessment - complete links to A4 sheet, quizes, and IB style test
Membranes & proteins activity
Exocytosis - student activity needs finishing
and maybe:
Redraft of Critical thinking lesson
Surface area volume ration lesson