NEETZoologyOrganisms and Populations
In the context of population ecology, what do birth rates and death rates refer to?
Options
- ATotal number of births and deaths in a population
- BPer capita births and deaths
- CGenetic diversity within a population
- DPhysical characteristics of organisms
Correct answer
B. Per capita births and deaths
Step-by-step solution
A population has certain attributes whereas an individual organism does not. An individual may have births and deaths, but a population has birth rates and death rates. In a population these rates refer to per capita births and deaths. The rates, hence, expressed are change in numbers (increase or decrease) with respect to members of the population. Here is an example. If in a pond there were 20 lotus plants last year and through reproduction 8 new plants are added, taking the current population to 28, we calculate