Q45 - Density-Dependent Growth Curves and Extinction Risk in Two Life-History Types
Density dependence is the fundamental process governing the population dynamics of organisms. The graph below describes per capita (per-individual) birth rate and death rate as a function of population density in two types of species (I and II).
Figure 1.
Using the information and data, determine which of the statements are true or which are false.
A. Asexually reproducing species are more likely to be type I than sexually reproducing ones.
B. Population density is kept constant around all points of A, B, and D with a density-dependent manner.
C. The aggregation of individuals is advantageous, rather than detrimental, below the density threshold of C.
D. Type I species are more likely to go extinct when the population is severely decreased, than type II species.
Question reproduced from IBO 2020, Theoretical Exam 1, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)