The New syllabus teachers guide 2019 for biology the English medium which is in NIE site, in the forward, the director general (NIE) states ....Quote "the present Teachers' Guides have given the necessary freedom for the teachers to select quality inputs and activities in order to improve student competencies. Since the Teachers'
Guides do not place greater emphasis on the subject content prescribed for the relevant grades, it
is very much necessary to use these guides along with the text books compiled by the
Educational Publications Department if, Guides are to be made more effective. "Unquote.
Since there is no text book prescribed here what is the situation? There would be no uniformity for a answer and the marking scheme cannot be taken as the sole guide for an answer!