questions i got wrong

Question 1

Explain the advantage in this system of growing leguminous plants such as groundnuts or beans (4)

Answer 1

• Nitrogen fixing bacteria
• in root nodules (of legumes);
• convert nitrogen to ammonium ions
• and converted to nitrates;
• less need for fertiliser;

Question 2

Explain the advantage in this system of stocking the pond with fish that feed on algae rather than with carnivorous fish (3)

Answer 2

• Shorter food chain / less trophic levels;
• will produce a greater yield of fish;
• less energy lost between stages / more energy from producers;
• (energy loss) in respiration / as heat;
• fish prevent algal blooms / equivalent;