Unit Test Answers

Doctors are seeing an alarming increase in the number of cases of tuberculosis (TB) that is resistant to drugs commonly used to treat the disease. TB is difficult to pass to other people without prolonged contact, but it is often fatal if it is not treated. How will doctors most likely respond to someone who has an active case of drug-resistant tuberculosis?

HIV, the virus that causes AIDS, is transferred through body fluids. People once thought that HIV infections were untreatable. Now, many people live relatively long and healthy lives despite being infected with HIV. This is possible because science helped

Which of the following is not a career in environmental science? a. Atmospheric scientist b. Environmental engineer c. Psychoanalyst d. Toxicologist Please select the best answer from the choices provided

Which of the following is not an example of an abiotic factor?a.plantsb.airc.temperatured.soil

The ecosystem is the lowest level of the biosphere hierarchy to include _______.a.the animal species presentb.weather patterns and soil conditionsc.interactions between different speciesd.the plant species present

A portion of grass in a prairie ecosystem was destroyed by wildfire. What will most likely happen to the population of bison that feed on the grass?a.The number of bison will increase.b.The number of bison will decrease.c.The bison in the ecosystem will be completely wiped out.d.The number of bison will remain unchanged.

Which type of environmental scientist is likely to study how different species of birds interact?a.Hydrologistb.Toxicologistc.Oceanographerd.Ecologist

What does an ecopsychologist study?a.the mental health of environmental scientistsb.the relationship between animals’ interactions and their mental healthc.the relationship between animals’ behavior and the environmentd.the relationship between a person’s mental health and the environment

A recent study has shown an increase in the number of predators in an ecosystem. Which of the following is a possible cause for the growth? a. A decrease in the population of prey it feeds on. b. An increase in the population of prey it feeds on c. A decrease in the biodiversity of the ecosystem d. An increase in the number of predators that feed on it Please select the best answer from the choices provided

Pasteurization is a process that heats milk to remove disease-causing organisms. It does not change the nutritional value or taste of the milk. Some other foods can also be pasteurized. However, if meat is heated, its quality, including taste, change. Which was developed to allow for a similar effect without the loss of food quality?

Which is a type of irradiation used to prevent food-borne illnesses?

In response to scientific understanding about food-borne disease, what have scientists and health officials recommended be used to keep people safe without affecting the taste or nutrient content of foods such as lettuce and other vegetables?

In general the warmest biomes in the world are found _______.a.at the polesb.in the southern hemispherec.near the equatord.on the western coasts of continents

Environmental engineers minimize the impact of land development on the environment.

Which type of environmental scientist is most likely to study the effects of air pollution on asthma?a.Hydrologistb.Toxicologistc.Environmental physiciand.Ecologist

The proper order, from smallest to largest, for the levels of organization is _______.a.population, community, organism, biome, ecosystem, biosphereb.organism, community, population, ecosystem, biome, biospherec.biosphere, biome, ecosystem, community, population, organismd.organism, population, community, ecosystem, biome, biosphere

Which of the following groups of environmental science careers are most similar? a. Hydrologist, toxicologist, environmental lawyer b. Environmental physician, environmental veterinarian c. Environmental activist, oceanographer, ecologist d. Oceanographer, Environmental journalist Please select the best answer from the choices provided

Which ecosystem contains 32% of the world's producers? a. terrestrial ecosystem b. freshwater ecosystem c. aquatic ecosystem d. marine ecosystem Please select the best answer from the choices provided

What did Alexander Fleming discover that helped solve a societal problem?

What types of organisms will be affected by a decreased supply of water in an ecosystem?a.Producers, consumers, and decomposers will be affected.b.Producers and consumers will be affected.c.Consumers and decomposers will be affected.d.No organisms will be affected.

Which is the best classification for West Nile virus?

Which of the following scenarios represents change to an ecosystem brought about by biotic factors?a.a wildfire caused by lightning striking a treeb.a flood caused by a severe stormc.a landslide caused by cattle overgrazingd.a volcano

Hantavirus is a relatively rare emerging infectious disease that is spread by contact with the contaminated feces and urine of rodents, such as deer mice. It does not spread between people and causes flu-like symptoms. How would scientists most likely recommend that the disease be controlled?

Scientists are concerned about the invasion of pythons in the Florida Everglades. Pythons are from Asia and are not native to the Everglades. They eat eggs and birds, many of which are endangered. The snakes were introduced to the Everglades when people released into the wild pet snakes that had grown too large. Very few animals in the Everglades prey on the snakes. How will scientists be most effective at controlling this invasive species?

How can irradiation solve a societal problem?