Ecologists use survivorship curves to visualize how the number of individuals in a population drops off with time. by plotting the number of survivors per 1,000 individuals on a log scale versus time, three basic patterns emerge, seen here in the graph. all but one statement is true regarding the three types of survivorship curves. that is a) populations with type i survivorship are well cared for by parents. b) in general, type i survivorship is more typical of k-selected species. c) individuals with type ii survivorship exhibit high survivorship throughout their life cycle. d) type iii offspring receive very little parental involvement during the juvenile period of life.