DP Biology (last assessment 2024)
Question 19N.3.HL.TZ0.c
| Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.3.HL.TZ0.c |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
19N.3.HL.TZ0.c
By mid-2005, the Chinese government had established over 50 panda reserves. These protect more than 10 400 km2 and over 45 % of remaining panda habitat. There are also efforts to ensure the existence of natural corridors between panda populations.
[Source: Manyman/
https://commons.wikimedia.org/wiki/Ailuropoda_melanoleuca#/media/File:Giant_Panda_eating_Bamboo.JPG,
licensed under CC BY-SA 3.0]
State what a high value of Simpson’s reciprocal index of diversity suggests about an ecosystem.
[1]
Markscheme
a. stable/balanced ecosystem
OR
high species richness/evenness ✔
b. ecosystem not under stress ✔
c. ancient ecosystem
OR
absence of changes ✔
Accept final stage of succession, climax community.
