Ecology Quiz 3

What is most likely to happen to the population of minnows in Lake Hiawatha?

• it will increase

• it will decrease

• it will stay the same

• it will first increase, then decrease

What is most likely to happen to the population of the new species of fish in Lake Hiawatha?

• it will increase

• it will decrease

• it will stay the same

• it will first decrease, then increase

The introduction of this new species of fish into Lake Hiawatha provides an example of:

• competition

• parasitism

• predation

• mutualism

Which of the following is an example of a mutualism?

• a mosquito feeding on the blood of a bison

• a coneflower being pollinated by a bee

• a mushroom growing in the soil

• a mouse and a bird eating the same kind of seed

The main reason some introduced species survive and overpopulate an area is that:

• there are few natural predators in the area

• there is not enough food for other organisms

• most organisms can survive in new habitats

• people feed them

Invasive species are usually:

• larger than native species

• smaller than native species

• the same size as native species

• none of the above

Solutions to problems caused by invasive species:

• require using every possible treatment regardless of the trade-offs

• are easy to develop

• are relatively inexpensive

• involve identifying criteria and constraints

What pattern do you see in the number of native birds?

• The number of native birds increases from the interior to the edge of the forest.

• The number of native birds increases from the edge to the interior of the forest.

• The number of native birds shows no pattern.

• No pattern can be detected because there were no birds towards the edge of the forest.

What might be causing the above patterns?

• Both native plants and birds prefer lower temperatures.

• Non-native plants prefer higher temperatures.

• Both native plants and non-native plants prefer lower temperatures.

• Native birds prefer non-native plants.

What pattern do you see in the plants along the transect from the edge to the interior?

• The number of native plants increases while the number of non-native plants decreases.

• The number of native plants remains the same while the number of non-native plants increases.

• The number of native plants increases while the number of non-native plants remains the same.

• The number of native plants and non-native plants both increase.