for a practice exam I have to draw the life cycle of a fern labelling haploid and diploid stages. however I have no clue how to do this and the...

for a practice exam I have to draw the life cycle of a fern labelling haploid and diploid stages. however I have no clue how to do this and the answer key refers to a textbook i do not have. Its question 2 on this page http://www.langdonbiology.org/Honors/Units/13_Plants/Plants%20Practice%20Exam.pdf