Teaching MPPSC Assistant Professor Mock Test Series 2025 Life Sciences Ecological Principles Ecosystem Ecology
Birds in a population show two foraging phenotypes, A and B. Birds of phenotype A search, attack and capture prey while birds of phenotype B steal prey from birds of phenotype A. A and B are maintained in the population through negative frequency-dependent selection. The graph below shows the fitness of A (broken line) and B (solid line) at different relative frequencies of A (frequency of B = 1-frequency of A).
Which of the following statements does the graph support?
1
A outcompetes B; at equilibrium, A goes to fixation.
2
B outcompetes A; at equilibrium, B goes to fixation.
3
A and B are both maintained in the population; the equilibrium frequencies are A = 0.6, B = 0.4.
4
A and B are both maintained in the population; the equilibrium frequencies are A = 0.9, B = 0.1.