AP BIOLOGY

Detailed explanation-1: -A survivorship curve is a graph showing the number or proportion of individuals surviving to each age for a given species or group (e.g. males or females). Survivorship curves can be constructed for a given cohort (a group of individuals of roughly the same age) based on a life table.

Detailed explanation-2: -Survivorship curves are graphs that show the proportion of a population that survives from one age to the next. These curves represent age-specific mortality in a group of organisms.

Detailed explanation-3: -A type II survivorship curve shows a roughly constant mortality rate for the species through its entire life. This means that the individual’s chance of dying is independent of their age. Type II survivorship curves are plotted as a diagonal line going downward on a graph.

Detailed explanation-4: -In survivorship curve. The Type III curve, characteristic of small mammals, fishes, and invertebrates, is the opposite: it describes organisms with a high death rate (or low survivorship rate) immediately following birth.