Question 17N.3.SL.TZ0.14
| Date | November 2017 | Marks available | [Maximum mark: 5] | Reference code | 17N.3.SL.TZ0.14 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Calculate, Explain, Outline, State | Question number | 14 | Adapted from | N/A |
Data from the International Union for Conservation of Nature (IUCN) indicates that the population numbers of many mammal species are decreasing. The chart shows reasons for the decrease and the number of species in each category of danger.
[Source: Michael Hoffmann et al. 2011. The changing fates of the world’s mammals. Philosophical Transactions of the Royal Society B, Volume 366, issue 1578. DOI: 10.1098/rstb.2011.0116. By permission of the Royal Society.]
Calculate how many species are classified as endangered due to hunting and trapping.
[1]
14/15/16
Do not accept intermediate values eg: 14.5
State one reason mammals can continue to survive even if they are extinct in the wild.
[1]
zoos/nature reserves/captive breeding/ex situ conservation/farming/husbandry/pets
Outline how deforestation can affect the richness of biodiversity in an ecosystem.
[1]
deforestation reduces richness by destroying habitat/loss of food/shelter/nesting sites
Explain the impact of plastic waste on Laysan albatrosses (Phoebastria immutabilis).
[2]
a. adults/young ingest plastic «which is indigestible»
b. plastic damages/fills stomach «can lead to starvation and death»
c. plastic blocks intestine so food cannot be digested «can lead to starvation and death»
d. adults/young can become entangled in plastic and so they drown/choke/suffocate
Allow other verifiable effect of plastic
“Can kill the birds” is too vague and worth [0]
[Max 2 Marks]
