Question

what is a cohort ? How it is used for preparing survivorship curves

Answer 1

 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.

There are three generalized types of survivorship curves:[1]

Type I or convex curves are characterized by high age-specific survival probability in early and middle life, followed by a rapid decline in survival in later life. They are typical of species that produce few offspring but care for them well, includ

Answer 2

here is your answer in the picture attached