Although total number is generally the most appropriate measure of population density, it is in some cases either meaningless or difficult to determine as in the case of

Question

Although total number is generally the most appropriate measure of population density, it is in some cases either meaningless or difficult to determine as in the case of (A) A dense laboratory culture of bacteria in a petri dish (B) Comparison of population density of 200 Parthenium plants and a single huge banyan tree with a large canopy (C) Tiger census (D) Both A and B

Tardigrade Admin · Accepted Answer

In an area if there are 200 Parthenium plants but only a single huge Banyan tree with a large canopy, stating that the population density of Banyan is low relative to that of Parthenium amounts to under estimating the enormous role of Banyan in that community. In such cases percent cover or biomass is more meaningful measure of the population size.

Q. Although total number is generally the most appropriate measure of population density, it is in some cases either meaningless or difficult to determine as in the case of

A dense laboratory culture of bacteria in a petri dish

Comparison of population density of $200$ Parthenium plants and a single huge banyan tree with a large canopy

Tiger census

Both $A$ and $B$