Unit Test — Unit test Answers

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?

Which of the following statements about the impact of biotechnology on the environment is not true?a.Biotechnology can positively impact the environment through the use of organisms that degrade pollutants.b.Biotechnology use can lead to an increase in soil erosion and pollution runoff through decreased pesticide use.c.The use of biotechnology in agriculture can lead to a decrease in pesticide use, positively impacting the environment.d.Biotechnology can lead to greater competition among natural and genetically engineered organisms in an ecosystem.

Lice are small wingless insects that make their home in human hair and feed on very small amounts of blood from the scalp. They can be transferred from person to person and through the use of contaminated items such as brushes or pillows. Which type of disease is lice infestation?

Which of the following household products is potentially hazardous?a.bleachb.solventsc.paintd.all of the above

Asbestosis is a lung disease that is caused by inhaling asbestos, a mineral that was once used as insulation and fire retardant in building materials. Which best describes abestosis?

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

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

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

Heredity has an impact on personal health, but environmental factors are important as well.

Which of the following is a disadvantage associated with scientific advances?a.decreased urbanizationb.increased energy efficiencyc.increased waste productiond.increased renewable resource use

Which of the following statements best describes the relationship between the environment and human health?a.The environment is the only factor that affects human health.b.Many aspects of the environment can have an impact on human health.c.Human health is impacted by changes in climate.d.The environment has no impact on human health.

How do environmental factors influence genetic traits?a.Environmental factors determine all genetic traits.b.Environmental factors can determine if a genetic trait becomes a health issue.c.Environmental factors are determined by genetic traits.d.Environmental factors have no influence on genetic traits.

In the 1950s, the structure of DNA was discovered by using models and x-ray chromatography. Currently, science has used advanced technology to completely map out the genes in a human’s body. What would be the best advantage of using this information?

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

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

Which is a sustainable practice?

Heart disease is a noncommunicable disease because

When two species compete for the same ecological niche, they cannot coexist because they are competing for the exact same resources. One species is always slightly better adapted for the niche than the other, so over time the disadvantaged species will either go extinct or shift to a different ecological niche. This situation highlights the concept of _______.a.carrying capacityb.competitive exclusion c.limiting factord.biotic factor

What is the evidence that depression can be linked to genetic as well as environmental factors?a.All individuals in similar stressful environments do not experience depression.b.All individuals with the gene variation tied to depression do not experience depression.c.Individuals with a combination of environmental stress and gene variation are more likely to experience depression.d.All of the above

Which is a renewable resource?