HORTICULTURE

Detailed explanation-1: -Two types of population growth patterns may occur depending on specific environmental conditions: An exponential growth pattern (J curve) occurs in an ideal, unlimited environment. A logistic growth pattern (S curve) occurs when environmental pressures slow the rate of growth.

Detailed explanation-2: -Exponential Growth Under ideal conditions, populations of most species can grow at exponential rates. Curve A inFigure below represents exponential growth. The population starts out growing slowly. As population size increases, the growth rate also increases.

Detailed explanation-3: -In exponential growth, a population’s per capita (per individual) growth rate stays the same regardless of population size, making the population grow faster and faster as it gets larger. In nature, populations may grow exponentially for some period, but they will ultimately be limited by resource availability.

Detailed explanation-4: -And while every population pyramid is unique, most can be categorized into three prototypical shapes: expansive (young and growing), constrictive (elderly and shrinking), and stationary (little or no population growth).