DP Biology (last assessment 2024)

Test builder »

Question 19M.3.SL.TZ1.2b

Select a Test
Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.SL.TZ1.2b
Level SL Paper 3 Time zone TZ1
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 2]
19M.3.SL.TZ1.2b

When feed for animals is stored, moisture levels need to be kept low to prevent the growth of fungi. Feed was exposed to 15 % moisture and placed into a respirometer. O2 consumption was monitored using the respirometer over a period of six days.

[Source: © International Baccalaureate Organization 2019]

(b)

Outline the role of fungi in nutrient cycling.

[2]

Markscheme

a. act as saprotrophs/decomposers ✔ 

b. rot/feed on/break down organic matter/food/organisms 
OR
return nutrients trapped in organic matter to the cycle/soil ✔

Do not accept detritivores

Syllabus sections