Ecologists use survivorship curves to visualize how the number of individuals in a population drops off with time. By plotting t
he 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 Il survivorship exhibit high survivorship throughout
their life cycle.
D) Type III offspring receive very little parental involvement during the
juvenile period of life.
The wrong statement is C. <em>Individuals with Type Il survivorship exhibit high survivorship throughout
</em>
their life cycle.
Explanation:
Different species have survival curves differently shaped. In general terms, there are three different survival curves.
Type I.Organisms do not tend to die when they are young or middle-aged, but they do when they are old. These species, in general, have a few descendants and parents provide much parental care to ensure their progeny survival. Typical of K selected species.
Type II. Organisms that have more or less the same probabilities of dying in each age interval. These organisms can also have a few descendants and they can provide significant parental care.
Type III. Only a few individuals survive their first period of life or their firsts years. However, the lucky ones to reach a certain age generally have a long life. These organisms have a lot of descendants at the same time, but they do not provide much parental care. Typical of r selected species.
