Question 19M.2.HL.TZ2.b
| Date | May 2019 | Marks available | [Maximum mark: 3] | Reference code | 19M.2.HL.TZ2.b |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Suggest | Question number | b | Adapted from | N/A |
Suggest how climate change can influence the natural selection of organisms that live in the Arctic oceans.
[3]
a. individuals in a population will show a variation of adaptations to climate change ✔
b. organisms that resist temperature changes
OR
current changes of the ocean/melting ice/more acidity/changes in food chains will survive better ✔
c. reproduce more and pass on their characteristics ✔
d. organisms with less adaptation will disappear with time ✔
e. example «eg polar bears have less ice to be able to catch prey/seals and are starving the ones that manage to find other food sources will survive» OWTTE ✔
f. changes will occur within species
OR
new species may appear «over time» ✔
Accept any valid example of an Arctic ocean organism.
In 3b weaker candidates seemed to think that they needed to give a detailed description of climate change and filled up most of the box with it. Better candidates were able to state that animals who could cope with warmer surroundings, would survive to breed and pass on their characteristics, while those who could not would perish, and give an example such as the polar bear. There were some G2 comments that Arctic foodwebs were not on the syllabus. It is doubted that any IB student does not know that it is cold in the Arctic, but because of climate change it is warming up slowly.
