Exam 34: Population and Community Ecology

A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars. This population has undergone a reduction in population size due to

Consider the life of the praying mantis. The large predatory female lays several hundred eggs in a foam mass in the fall. The young are most vulnerable when they emerge in the spring, but the few that survive spread out over the countryside and, if they find a mate, lay eggs the following fall. Which type of survivorship curve does this represent?

A form of symbiosis in which both participants benefit is

Secondary succession occurs where is there is bare rock.

An example of two similar species occupying slightly different niches in the same community would be

All of the organisms living in your front yard represent a(n)

When growth stops, a population has reached

When growth proceeds at a rate similar to 2 → 4 → 8 → 16 → 32 → 64...etc., it is called

In a pine forest, very few other species of plants can grow underneath the pine trees because pine needles make the soil very acidic. This is an example of

The idea that plants are unable to grow in a particular area until the soil has been enriched by an earlier community is the

Black-and-yellow stripes are a common warning coloration. Among a set of insects that possess black-and-yellow patterns are: -female wasps that sting -male wasps that do not sting -a tasty, harmless, and nutritious leaf beetle -an acrid blister beetle that makes you sick if you eat it -a harmless hover fly that sounds and looks like a bee This assortment represents

Which of the following human populations would be expected to have the greatest increase in growth rate?

The carrying capacity of the environment for a species is determined by

There are two organisms with overlapping ranges that fill a similar niche. Where their niches overlap, there is strong competition for resources. This will eventually lead to

Replacement reproduction occurs when

Which of the following statements accurately describes the less developed countries?

The harmless orange-and-black viceroy butterfly closely resembling the toxic orange-and-black monarch butterfly is an example of

Explain the species interactions in each of the following symbiotic relationships: parasitism, commensalism, and mutualism.

One model of succession predicts that different types of plants can all colonize an area at the same time and it is chance alone that determines which one arrives first and begins the process of succession. This model is called

Organisms that are parasites