Question
Nitrogen is one of the most important chemical elements in the biosphere.
Nitrogen must be continually recycled if life is to continue on Earth.
Savanna grasslands are an important ecosystem in Africa.
Fig. 6.1 shows part of the nitrogen cycle in a grassland ecosystem in southern Africa.
(a) Name:
(i) a type of nitrogen-containing compound that is made by Cassia mimosoides, eaten
by the impala and by the cheetah;
(ii) the type of consumer as represented by the cheetah;
(iii) the process by which urea is removed from the body of the animals as shown
by D;
(iv) process F.
(b) Explain the importance of recycling nitrogen in ecosystems, such as the African
savanna.
(c) The most common plants that grow in the African savanna are grasses. There are very
few legume plants, such as C. mimosoides.
Suggest reasons why C. mimosoides is a rare plant in the African savanna.
(d) Explain why there are far fewer cheetah than impala.
(e) The cheetah is an endangered species.
It is important to conserve their food supply and all the species that inhabit their
ecosystem.
Explain why.
▶️Answer/Explanation
Question
Figure shows part of the water cycle.
The letters represent processes that take place in the water cycle.
Complete Table 10.1 by stating the names of processes X, Y and Z in Fig. 10.1.
Answer/Explanation
Ans
