Unit Test Answers

Which sustainable practice is paired correctly with its impact on the environment?

Which molecule would be the most affected by limited nitrogen?

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

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?

White perch is a fish that is native to Atlantic coastal regions and is invasive to the Great Lakes. It feeds on native species and is thought to be the cause of the decline of the Great Lakes walleye fish populations. What was most likely its mode of introduction?

Read the following excerpt about water availability to living organisms.“Water covers 75 percent of Earth. 97 percent of water on Earth is salt water. Only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.” Based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink?

Which best describes what is occurring in this population of squirrels?Number of Squirrels Entering and Leaving a Population after 1 YearCause of changeNumber of squirrelsDied from predation2Born4Immigration10Left to find food3Died from disease8Left to find a mate3

Which characteristic best distinguishes runoff and infiltration?

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

The burrowing owl is found in dry, open areas such as grasslands, prairies, savannas, deserts, farmlands, golf courses, and urban areas throughout most of western United States and Florida, Central America, and most of South America. It makes its home in burrows of other animals and primarily eats insects and small rodents. As humans build more cities, nearby burrowing owl habitats change due to destruction of burrows and loss of prey. Which is the least likely outcome of the habitat changes that are described?

Rainforests around the world are being cleared at an alarming rate to make room for new communities, agriculture, mining, and roads, and to provide lumber for construction and furniture. How might the destruction of rainforests affect the balance of gases in Earth's atmosphere?

A mountain lion population recently experienced a drop in population size. Which of the following would best describe the limiting factor that is involved?

Consider the following data. Rates for Cheetah Population from 2011 to 2012Cause of change20112012Deaths21Births54Immigration 61Emigration83Which would have to happen to keep the population growth of cheetahs in 2013 the same the previous years?

A group of environmentalists was discussing the benefits and drawbacks associated with using fossil fuels. Which argument best fits the conversation?

What would happen to the size of the carnivore population if the herbivore population increased?

open oceanwetlandsneritic zoneintertidal zone

A trout population grew from 4 in 1992 to 16 in 1993 and then to 64 in 1994. If it continued to grow exponentially, approximately how many trout were there in 1995?

A grass starts with 30,000 kJ of energy. How much energy would a cheetah acquire after it ate a zebra that consumed the grass?

Which determines carrying capacity?

Which organism obtains its energy exclusively from dead or decaying matter?

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

The map shows the distribution of wild boars in the United States (shaded area). Which of these facts about wild boars is best supported by the evidence provided?

What is the difference between food chains and food webs?

Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 19902000Lions100,00047,000Cheetahs25,0007,500Zebras750,000450,000Which explanation is best supported by the numbers in the chart?

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Which describes a way in which phosphorus may enter into the phosphorus cycle?

Which statement about water best illustrates the property of adhesion?

Interactions between organisms and their environment impact the organism’s overall population. The jaguar Panthera onca is the largest cat in North America. It is found in areas across the Southwest, including Arizona, New Mexico, and Texas. It is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, and many smaller mammals. Which shows the relationship between the jaguar and turtles?

How would an increase in nest sites affect a population of pigeons?

Which sequence of processes transports water from the atmosphere to the ocean and then back into a cloud?

The Serengeti plains are part of the African savanna ecosystem and are home to a variety of different species of plants and animals. The Serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. Which type of limiting factors does the seasonal drought in the Serengeti plains affect?

Ash trees are being removed when they show signs of the ash borer, a parasite that affects only ash trees and kills them off. What best explains why the ash trees are being cut down?

Wolves are predators of deer. What is most likely to happen to the deer population if the wolf population increased?

Which human activity is correctly paired with the greenhouse gas that it increases?

Estelle makes a Venn diagram to compare the fast- and slow-flowing areas of rivers and streams.

Which best describes how an organism’s niche is determined?

A fish has armored plates that enable it to handle the extreme pressure in the deepest, darkest aquatic ecosystem.Where is this fish adapted to live?