Why is population density always estimated and not an exact number?
Answers
Explanation:
Four methods of determining population size are direct and indirect observations, sampling, and mark-and-recapture studies.
Answer:
A population consists of all the organisms of a given species that live in a particular area.
The statistical study of populations and how they change over time is called demography.
Two important measures of a population are population size, the number of individuals, and population density, the number of individuals per unit area or volume.
Ecologists estimate the size and density of populations using quadrats and the mark-recapture method.
The organisms in a population may be distributed in a uniform, random, or clumped pattern. Uniform means that the population is evenly spaced, random indicates random spacing, and clumped means that the population is distributed in clusters.
Hope u get it
Mark me as the brainliest
Explanation: