Help understanding scaffold generator (forms)

I'm trying to understand how the Rails scaffold generator works well
enough that I can teach in to write Markaby files. Most of the
templates were easy, but I'm having problems with the form templates.

1. The template/form.rhtml file refers to <%= template_for_inclusion
%>. Where does this variable come from?

2. How do the ' <table><tbody> ' tags get generated. I don't see
them in any of the scaffold_generator files.

3. What does 'lamda(method_name)' do?