Which Situation Is an Example of Density-Independent Population Regulation

question 119

Multiple Choice

Which situation is an example of density-independent population regulation?

• A) An early cold spell kills 80 percent of the sparrows in a particular area.
• B) When lemmings are abundant, arctic foxes switch their primary diet from mice to lemmings.
• C) Lemming predators search widely for places where lemmings are abundant and concentrate their hunting in those areas.
• D) A contagious disease sweeps through a dense population of squirrels but leaves a less-dense population relatively untouched.
• E) An outbreak of an insect species depletes their food supply; the next generation of insects is underfed and produces few offspring.

---

Definitions:

Cerebral Spinal Fluid

A clear, colorless body fluid found in the brain and spinal cord, which acts as a cushion for the brain's cortex, providing basic mechanical and immunological protection to the brain inside the skull.

Glial Cells

Non-neuronal cells in the central and peripheral nervous systems that support and protect neurons, playing crucial roles in brain function.

Cushioning Effect

A psychological or physical phenomenon where a buffer exists or is created to lessen the impact of a stressful or negative event.

Neural Impulse

Refers to the electrical signal that travels along a neuron, enabling communication within the nervous system.