Question

The populations, showing relatively constant density around the carrying capacity of the environment, is called

• A. r-selected
• B. m-selected
• C. k-selected
• D. p-selected

Hint:

Associate the letters with their meaning:

\textbf{K} \(\rightarrow\) \textbf{K}arrying \textbf{K}apacity. These species are good competitors in crowded conditions.
\textbf{r} \(\rightarrow\) rate of population increase. These species are good at reproducing quickly in uncrowded conditions. \end{itemize}

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This question relates to the r/K selection theory, which describes two contrasting strategies of reproduction and life history. The carrying capacity of an environment is denoted by the variable 'K'.

Step 2: Detailed Explanation:
- K-selected species are adapted to stable environments where population size is at or near the carrying capacity (K). They are characterized by having fewer offspring, longer lifespans, significant parental investment, and their populations tend to be relatively stable around K. Examples include elephants, whales, and humans.
- r-selected species are adapted to unstable environments. They prioritize high reproductive rates (r) and produce a large number of offspring with little parental care. Their populations often fluctuate significantly and are usually well below the carrying capacity. Examples include bacteria, insects, and weeds.
- The terms 'm-selected' and 'p-selected' are not standard terms in this ecological context.

Step 3: Final Answer:
The description of a population with a relatively constant density around the carrying capacity is the defining feature of a K-selected population. Thus, option (C) is correct.