| Date | May 2015 | Marks available | 1 | Reference code | 15M.3.HL.TZ1.11 |
| Level | Higher level | Paper | Paper 3 | Time zone | Time zone 1 |
| Command term | State | Question number | 11 | Adapted from | N/A |
Question
Distinguish between the use of a quadrat and a transect in gathering field data.
State the change in species diversity and the change in production during primary succession.
Species diversity: ...............................................
Production: ........................................................
State one difficulty in classifying organisms into trophic levels.
Markscheme
Accept any horizontal set of ideas, up to two sets.
Species diversity: rises
Production: rises
Both needed for [1].
an organism can occupy/feed at more than one trophic level
Examiners report
Candidates seemed to have very poor knowledge of the differences between a quadrat and transect and when each was used.
Both parts of this section were answered correctly by most candidates.
Both parts of this section were answered correctly by most candidates.
