QUIZ 1. What is true of a Lazarus taxon? a. It mainly applies to those organisms that have shown up in the fossil record. b. It does not exist today because researchers keep closer track of extinct species. c. It involves all living and previously living forms of life, even if their presumed extinction was recent. d. It mainly involves species with long lifespans that reproduce under circumstances where the taxon’s numbers are rare. Answer: c. The phenomenon of the Lazarus taxon applies to past or presently living organisms that were once considered extinct but have been later rediscovered. All types of organisms can have Lazarus taxa. 2. A species that has survived unchanged for many millions of years on earth is called what? a. Extant species b. Lazarus species c. Elvis species d. Living fossil Answer: d. A living fossil is a type of species that has survived relatively unchanged in nature for hundreds of millions of years for whatever reason. 3. What is a species called that affects the populations of many other species called? a. Umbrella species b. Keystone species c. Apex predator d. Flagship species
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