Question 18M.2.HL.TZ1.1e
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.2.HL.TZ1.1e |
| Level | HL | Paper | 2 | Time zone | TZ1 |
| Command term | Suggest | Question number | e | Adapted from | N/A |
Scientists have hypothesised that bats affected by WNS could be more likely than unaffected bats to emerge from hibernation during the winter. Bats occasionally undergo short interruptions in hibernation accompanied by an increase in body temperature. Scientists used sensors attached to M. lucifugus to monitor the temperature of a group infected with the fungus over the winter months. A second uninfected group was also monitored. The graphs show the results for two typical individuals.
Based on the data and your biological knowledge, suggest how the infection could lead to premature death in a bat.
[3]
a. energy needed to raise body temperature / lost during temperature spikes
b. energy/heat released by/comes from (cell) respiration/metabolism
c. food/fat (stores/reserves) used in (cell) respiration/in generating energy/heat/raising body temperature
d. bats die/starve if fat/energy/food stores used up
e. hibernation conserves food stores/reduces use of energy
f. no/little food available/food harder to find (in winter/during hibernation period)
g. (more) energy/food used when flying/hunting
h. (more) heat loss/hypothermia (in winter/cold weather)
i. higher chance of being killed by predators when flying/emerged from hibernation
