Which of these is NOT a population?

Question

BlackTom AI · Accepted Answer

To tackle the question, we first recall the definition of a population in ecology: a group of the same species living in a particular area at the same time.
Option 1: 'all of the Staph bacteria living on your skin' – This is a population because it consists of individuals of the same species (Staphylococcus bacteria) inhabiting a defined area (your skin).
Option 2: 'all of the different organisms living in your home' – This is not a population. It includes multiple species (bacteria, insects, plants, perhaps pets, etc.), so it represents a community rather than a single-species population.
Option 3: 'all of the people living in your town' – This fits the population concept, since all individuals are members of the same species (Homo sapiens) living in a defined area (your town).
Option 4: 'all of the dandelions in your yard' – This is a population because it comprises many individuals of the same species (dandelions) in a specified location (your yard).

In summary, the only option that fails the single-species criterion and thus is not a population is option 2, which describes a community rather than a population.

BIOL-10-40857 Week 2 Quiz

Which of these is NOT a population?

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