Unit Test — Unit test Answers

Which of the following is true concerning hull fouling from commercial shipping and recreational boating?a.It constitutes less than half of all nonnative species introductions.b.The revenue brought in from these industries is relatively small.c.It is difficult to prevent since ship hulls begin, conduct, and end voyages in water.d.It is best combated by chemical treatments.

While trees are not the largest level in the pyramid of numbers, they are still the base for both the pyramids of biomass and pyramids of energy.

A quaternary consumer species would be expected to have a smaller population than a secondary consumer species.

Variation of ecological habitats within a species is characteristic of which type of diversity?a.Genetic diversityb.Ecosystem diversityc.Species diversityd.Regional diversity

It is advantageous for a predator to prey exclusively on a single prey species.

Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments?a.Some species might become invasive and destructive if they escaped.b.Some species may be dangerous to humans.c.Nonnative plants and animals should only be used for commercial purposes.d.There is no reason to restrict an individuals’ right to own plants or animals.

Rabbits are best described as _______. a. producers b. primary consumers c. secondary consumers d. tertiary consumers Please select the best answer from the choices provided

The coyote's diet includes a wide variety of small mammals, livestock, birds, reptiles, carrion, fruit, and vegetables. It is one of the few animals that has enlarged its range since human encroachment began. Which is the most likely reason for this?

Variations within a species are an important part of Charles Darwin's theory of evolution. Which example can be explained by individual variation?

Humans process some foods by adding chemicals to reduce harmful bacterial growth. This allows foods to be edible for longer periods of time. Which best describes the advantages of food processing?

Which is an example of temporal isolation?

A theory is accepted as true when

A population of wolves in Wyoming experienced a rapid decline. Scientists found that 20 wolves died from rabies, 15 wolves died from mange (a parasitic mite), and 10 wolves died from natural causes. Wyoming experienced a recent drought, and many populations, including deer, bison, and bear, have diminished in the past year. What is best described in this scenario?

Explain how microevolution and migration can affect an ecosystem.

Consider the group of giraffes in the image below.Which statement about the giraffes explains their evolution based on Charles Darwin’s main points?