DP Biology (last assessment 2024)

Test builder »

Question 22N.2.SL.TZ0.c

Select a Test
Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.2.SL.TZ0.c
Level SL Paper 2 Time zone TZ0
Command term Calculate Question number c Adapted from N/A
c.
[Maximum mark: 1]
22N.2.SL.TZ0.c

The biodiversity of insects worldwide is in decline. Destruction of habitats, pollution and climate change have contributed to the decline in global insect populations and to the extinction of insect species. A comprehensive literature review was carried out to determine the annual global rate of decline in insect species. The graph shows the results for three major orders of terrestrial insects and the total decline in insect biomass worldwide.

Calculate the number of Coleoptera species that would be expected to exist after one year from a starting number of 400 000 species, assuming the mean rate of decline.

[1]

Markscheme

392 000 (species);

Syllabus sections