Question 18M.3.HL.TZ1.d
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.HL.TZ1.d |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | d | Adapted from | N/A |
Outline an example of a change in animal behaviour as a result of natural selection.
[2]
a. named animal and traditional behavior
b. natural selection pressure with resulting animal response
Accept common or general names of organisms.
Examples of change in colour (peppered moth) are not behavioural changes.
Example:
a. blackcap/warbler migrates to Spain
b. warmer winters in UK / more food resulting in selection of those migrating to UK / increased numbers / greater survival
OR
a. native green lizards traditionally occupy the lower branches and trunks of Florida’s trees
b. now live in upper branches due to pressure caused by competition of Invasive brown lizard (Over 20 generations/15 years developed sticky foot pads to hold on to smoother branches)
OR
a. House finches in California are sedentary/do not migrate
b. Introduced into New York (about 1940) and increasing numbers migrate south during the winter months to warmer conditions/more food
