Skip to content

Course home

Cycles within ecosystems

Cycles within ecosystems

EasyMediumHard
12345
Question 4

Five key processes in the nitrogen cycle are:

  1. Nitrification
  2. Denitrification
  3. Nitrogen fixation
  4. Ammonification
  5. Assimilation
a.

How many of these five processes involve the chemical conversion of gaseous nitrogen (N2\text{N}_2N2​) to or from the atmosphere?

[1]
b.

How many of these five processes occur within the soil or living organisms without directly absorbing or releasing gaseous nitrogen (N2\text{N}_2N2​)?

[1]
c.

Name the group of organisms responsible for breaking down organic nitrogen-containing compounds during ammonification.

[1]
Markscheme

Cycles within ecosystems Questions

  1. IGCSE
  2. /Biology
  3. /Cycles within ecosystems

12 exam-style questions on Edexcel IGCSE Biology Cycles within ecosystems. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank