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(Science: biology, cell culture, Ecology) The rate, or speed, at which the number of organisms in a population increases. this can be calculated by dividing the change in the number of organisms from one point in time to another by the amount of time in the interval between the points of time.
The average change in a population over time is referred to as the population growth rate. A positive growth rate indicates a population increase, and a negative growth rate indicates a population decrease.
growth, the increases in cell size and number that take place during the life history of an organism. Growth is seldom random. Rather, it occurs according to a plan that eventually determines the size and shape of the individual.
Growth Definition. What is growth in biology? Growth is the irreversible increase of an organism’s size over a given period. It may also be defined as one of the characteristics of a living thing. In biology, “biological growth” is associated with progressive development.
The population growth rate (sometimes called the rate of increase or per capita growth rate, r) equals the birth rate (b) minus the death rate (d) divided by the initial population size (N 0). Another method of calculating the population growth rate involves final and initial population size (figure \(\PageIndex{a}\)).
What are the underlying principles of how populations change over time? Two basic principles are involved, the idea of exponential growth and its ultimate control. The basics of population...
A pattern of exponential growth indicates that the growth rate is proportional to the total mass; as the mass grows, so does the growth rate. The growth rate is proportional to the amount of active protoplasm or replicating organisms.
The population growth rate (sometimes called the rate of increase or per capita growth rate, r) equals the birth rate (b) minus the death rate (d) divided by the initial population size (N 0). Another method of calculating the population growth rate involves final and initial population size (figure \(\PageIndex{2}\)).
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The important concept of exponential growth is that the population growth rate, the number of organisms added in each reproductive generation, is accelerating; that is, it is increasing at a greater and greater rate.