Population Ecology quiz

More questions about Population Ecology

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   What insects emerge in huge numbers every 13 or 17 years?

   Answer: Cicadas

   Why: Emerging at sometimes over 1.5 million per acre, they simply outnumber what their predators can eat.

2. 2 Medium

   About how many children per woman keep a rich country's population stable?

   Answer: 2.1

   Why: The extra 0.1 makes up for slightly more boys than girls being born and for children who die young.

3. 3 Hard

   What principle says two species can't coexist on one limited resource?

   Answer: Competitive exclusion

   Why: Gause showed it in the 1930s, when one Paramecium species drove another to extinction in a shared culture.

4. 4 Easy

   Which insects turn into swarming locusts when crowded?

   Answer: Grasshoppers

   Why: Tickling a lone desert locust's hind legs for about two hours is enough to make it act like a swarmer.

5. 5 Medium

   Which seal recovered after hunting cut it to perhaps 20 to 40 animals?

   Answer: Northern elephant seal

   Why: Because so few survived, today's northern elephant seals share very little genetic variety.

6. 6 Hard

   Where does the world's longest predator-prey study take place?

   Answer: Isle Royale

   Why: Wolves reached the island around 1949 by crossing an ice bridge during a harsh winter.