Neco 2024 Biology Question 36

A pond is surveyed using five (1\ \text{m}^2) quadrats. The numbers of individuals of three algal species recorded are: Species A - 120, 150, 130, 140, 110; Species B - 80, 70, 90, 85, 75; Species C - 200, 210, 190, 205, 195. Calculate the average density (individuals per (\text{m}^2)) of each species and convert to biomass using the conversion factors: Species A - 0.02 g per individual, Species B - 0.03 g per individual, Species C - 0.015 g per individual. Herbivorous insects X, Y and Z feed exclusively on A, B and C respectively. Their consumption rates are 0.5 g, 0.4 g and 0.6 g of algal biomass per insect per day and their population densities are 5, 4 and 6 insects per (\text{m}^2) respectively. Assuming insects convert all consumed algal biomass into their own biomass and that secondary consumers assimilate 20 % of the insect biomass, which algal species contributes the greatest amount to the secondary consumer biomass? State the species.