Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Two lifespan trajectories. The difference between the trajectories in Graphs (A,B) is caused by the sign (positive or negative, respectively) of the relationship between variable 7 and variable 10 (black arrow in C). The parameter values corresponding to the simulations are: Initial ability L = 0.041; Max L = 2.30 (A) and 1.80 (B); Rate r = 0.04 (A) and 0.01 (B); Genetic factor K = 0.99; and total support = 0.03.
