Unit Test — Unit test Answers

Which of the following is not a reason that populations display a regular (evenly spaced) distribution? a. territorial behavior b. competition for water c. competition for sunlight d. social behavior Please select the best answer from the choices provided

Which of the following statements about exponential growth curves is true?a.Exponential growth curves are common for R-selected species.b.Exponential growth curves show fast growth rates followed by slow growth rates.c.No organisms in nature experience exponential growth rates.d.Exponential growth curves are S-shaped.

What is a possible cause for a decrease in ecosystem productivity?a.an increase in the biodiversity of the ecosystemb.a decrease of the biodiversity of an ecosystemc.the biodiversity of an ecosystem experiencing no changed.an ecosystem becoming more stable

Consider the two male oryx that are shown below.Which of Charles Darwin’s main points is depicted in the image?

Natural selection is an evolutionary mechanism by which _______.a.advantageous traits are eliminated in a populationb.advantageous traits become more common in a populationc.inherited traits pass consistently through generationsd.organisms choose which traits to look for in their offspring

Which of the following is a possible reason for migration?a.microevolutionb.diminished food supplyc.increased ecosystem stabilityd.macroevolution

There are approximately 30,000,000 white-tailed deer in the United States, which covers 3,536,000 square miles. What is the population density, rounded to the nearest whole number, for the white-tailed deer?a.2 deer per square mileb.4 deer per square milec.6 deer per square miled.8 deer per square mile

A male cardinal’s red color is an example of a trait affected by natural selection. The females of the species choose mates based on the vibrant colors of the males’ feathers. If females begin using different criteria than feather color when they choose mates, what would most likely happen to the color of the male cardinals over time?

The _______ is the total number of organisms that an ecosystem can support.a.tolerance rangeb.carrying capacityc.competitive exclusion principled.population

Lions live in groups called prides. Lion populations would most likely fall in which category of population distribution?a.even b.randomc.clumpedd.density

A hunter illegally kills a wolf in Yellowstone National Park and attempts to bring the wolf's skull back to Florida. Which law is the hunter violating?

Review the picture below.Which would be the most accurate title for this picture?

Consider the following food chain:Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

Which of the following limiting factors would be directly affected by a drought?a.birth/death rateb.immigrationc.available niched.resource supply

Which method to determine population size is the least invasive?a.mark/recaptureb.direct observationc.samplingd.indirect observation

An ecosystem has experienced a flood. Which type of plants would you expect to see growing first after the flood?

What kind of display would be the best way to represent the data below?Type of speciesCritically endangered (%)Endangered or vulnerable (%)Plants1370Invertebrates035Freshwater fish937Amphibians730Reptiles528Birds012Mammals221

Which best illustrates a result of natural selection?

Charles Darwin hypothesized that some individuals would be better equipped for survival than others, and that those that were less equipped would not survive. Darwin formulated this hypothesis based on the work of which scholar?

Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the population density of bison living in Yellowstone?a.1.3 bison/mib.16 bison/mic.77 bison/mid.0.77 bison/mi