Topic Test Answers

Orange trees planted in a grove or orchard would most likely fall in which category of population distribution? a. even b. random c. clumped d. density Please select the best answer from the choices provided

Which of the following species would you most expect to be distributed according to a regular pattern?a.termitesb.stingless beesc.fishd.creosote bushes

Which of the following selection pressures is responsible for the limited evolutionary changes experienced by alligators and other crocodilians?a.stabilizing selectionb.directional selectionc.disruptive selectiond.high mutation rate

Which of the following statements about logistic growth curves is true?a.Logistic growth curves are common for R-selected species.b.Logistic growth curves are J-shaped.c.No organisms in nature experience logistic growth rates.d.Logistic growth curves increase exponentially at first, then experience slowed growth rates.

Which of the following is most likely an example of genetic drift resulting from the founder effect?a.The species’ physical habitat is limited.b.The population expresses a mix of dominant and recessive traits.c.The species occupies a small, specific niche.d.A population commonly expresses traits that are otherwise rare in the species.

Which of the following conditions would lead to a small population size?a.a low birth to death ratiob.a high birth to death ratioc.immigrationd.large number of resources

The total number of organisms an ecosystem can support is its tolerance range.

There are approximately 35,000 bald eagles in Alaska, which covers 586400 square miles. What is the population density for the bald eagles in Alaska? a. 17 bald eagles per square mile b. 0.04 bald eagles per square mile c. 0.06 bald eagles per square mile d. 1 bald eagle per square mile Please select the best answer from the choices provided

Population density is calculated by _______.a.dividing the number of organisms in a region by the land areab.multiplying the number of organisms in a region by the land areac.dividing the land area by the number of organisms in the regiond.by subtracting the land area from the number of organisms in a region

Regular distribution is observed for many organisms due to _______.a.the need to maximize exposure to sunlightb.the need to avoid predatorsc.interactions between individualsd.the plentiful availability of water

Identify the abiotic limiting factor from the choices below.a.biodiversityb.foodc.waterd.plant cover

R-organisms reproduce at a very high rate. Knowing this, why don’t they usually reach their carrying capacity?

Which of the following factors would have the least effect on the carrying capacity of an ecosystem?

The introduction of a virus to control an invasive species is an example of _______.

In nature, this method is the only way diversity is truly created. Changes in the genetic material of an organism are passed on to offspring and, although the process is slow, it could eventually result in the creation of a new species. These statements describe the effects of _______ on biodiversity.

A population’s distribution can be even, clumped, or random.

The application of pesticides to control an invasive species is an example of _______.

Which of the following statements is true?