Biology Paper 3 Marking??

[Igcse giver]

i wanted to know how are answers marked in bio p3 like in this marking scheme for questions 1b)
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_w10_ms_32.pdf
should we need to write all 9 points to get 3 marks or 3 of thoose 9 points will give us three marks as it is in ICT
plz help mee!!