According to U

question 259

Multiple Choice

According to U.S. antitrust enforcement guidelines, a merger is likely to be challenged if

• A) the HHI decreases after the merger.
• B) the industry after the merger has an HHI above 1,800 and the HHI rises by more than 50.
• C) the industry after the merger has an HHI above 1,800 and the HHI falls by more than 100.
• D) the industry after the merger has an HHI above 1,000 and the HHI rises by more than 10.

---

Definitions:

Parapatric Speciation

A mode of speciation in which new species evolve in adjacent or overlapping geographic areas, often due to differences in habitat or environmental pressures.

Sympatric Speciation

The process by which new species evolve from a single ancestral species while inhabiting the same geographic region.

Reproductive Isolation

Reproductive isolation occurs when reproductive barriers prevent or strongly limit reproduction between populations. The result is that few or no genes are exchanged between the populations.

Metapopulations

A group of spatially separated populations of the same species which interact at some level.