DP Biology (last assessment 2024)
Question 18M.3.SL.TZ1.14b
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.SL.TZ1.14b |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Suggest | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 3]
18M.3.SL.TZ1.14b
(b)
Suggest how human activities could impact the development of an ecosystem on exposed bare ground.
[3]
Markscheme
a. buildings/roads/walking prevent plant cover/soil development/cause soil erosion
b. may destroy moss/soil organisms / damage emerging vegetation
c. introduce alien species
d. rubbish/solid waste/pollution may impede natural development
e. feces/excrement may contribute to/alter soil development / add fertilizer/pesticides to increase growth of plants
f. sow seeds/planting and so alter diversity
g. irrigation/drainage to affect growth
