All Things Water...
The US Environmental Protection Agency sets restrictions on the levels of nitrogen-based compounds, such as nitrates, to ensure the safety of drinking water. Excess nitrates in water can cause rapid algae growth that produces toxins that are harmful to humans that drink the contaminated water.
Which of the following is a major source of nitrates in ground water?
A. industrial waste
B. agricultural fertilizer
C. radioactive waste
D. laundry detergent
B. agricultural fertilizer
Look at the Periodic Table...
Identify the element with 80 protons
Which best describes how athlete’s foot is spread to other individuals?
a. inhaling fungal spores in the air
b. eating food contaminated with fungus
c. having contact with fungus on a shower floor
d. swimming in a lake that has a large amount of algae
c. having contact with fungus on a shower floor
Which is the most useful change made to crops using applications of biotechnology?
A. crops use more nutrients
B. crops need more fertilizers
C. crops resist more diseases
D. crops take more time to grow
C. Crops resist more diseases
Some organisms obtain their food from a host organism. Which is the best example of this relationship?
A. a bat pollinating a cactus
B. a bird building a nest in a tree
C. a flea getting nourishment from a cat's blood
D. ants protecting a tree that produces their food
C. a flea getting nourishment from a cat's blood
Water that falls onto land surfaces is either soaked into the ground or flows downhill into a body of water. The water that soaks into the ground is called groundwater.
Soil and rock that allow this water to pass through them are called ________.
A. runoff
B. compacted
C. aquifers
D. permeable
D. permeable
Which best explains why conservation of mass should be studied in a closed system?
A. to prevent the loss of any reactants
B. to prevent contamination of the products
C. to prevent the release of any gases produced
D. to prevent the absorption of heat from the outside
C. to prevent the release of any gases produced
A doctor prescribed an antibiotic to treat an illness. Which type of illness did the doctor most likely treat?
a. Cancer
b. heart disease
c. viral infection
d. bacterial infection
d. bacterial infection
Which is a genetic engineering advancement directly related to a career in biotechnology?
A. improving solar energy collection
B. transporting textiles at higher rates
C. creating crop foods that resist insect pests
D. repairing historical sites with quality products
C. creating crop foods that resist insect pests
When would water be a limiting factor in an ecosystem?
A. when a population is small
B. when a population is decreasing
C. when a population contains many predators
D. when a population is approaching the carrying capacity
D. when a population is approaching the carrying capacity
Cody lives in a town in North Carolina that is not on a river. He is surprised when he learns his town is located in the Deep River basin. How is it possible that Cody lives in a river basin?
A. River basins are areas of land that drain water downhill to eventually end up in rivers and other reservoirs.
B. River basins collect water that quickly evaporates, and this water eventually ends up in rivers and other reservoirs.
C. River basins are areas of land where water is easily absorbed into the soil to form underground rivers.
D. River basins are areas of land where water cannot flow or be absorbed by the soil.
A. River basins are areas of land that drain water downhill to eventually end up in rivers and other reservoirs.
Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?
A. metals
B. nonmetals
C. metalloids
D. noble gases
A. metals
Which best explains why antibiotics are ineffective in treating viral infections?
A. Viruses destroy the antibiotic.
B. Antibiotics only kill living cells.
C. Antibiotics increase the rate of viral growth.
D. Viruses escape antibiotics by hiding in cells.
B. Antibiotics only kill living cells.
Which best explains how bacterial cells are able to produce insulin for humans?
A. the bacteria are grown on a petri dish which contain human insulin
B. the bacteria have been genetically engineered to contain the DNA needed to produce insulin
C. the bacteria have been exposed to radioactivity to create mutant strains capable of producing insulin
D. the bacteria are grown on a petri dish which contain sugar and insulin is produced in response to the sugar
B. the bacteria have been genetically engineered to contain the DNA needed to produce insulin
Which best describes the role of nitrogen-fixing bacteria in the flow of energy?
A. they convert carbon dioxide into nitrogen
B. they convert nitrogen into carbon dioxide
C. they convert sunlight and nitrogen into energy rich sugar molecules
D. they convert atmospheric nitrogen into molecules other organisms can use
D. they convert atmospheric nitrogen into molecules other organisms can use
A team of scientists have studied the species of macroinvertebrates (bio-indicators) living in a river for 10 years. In year 1, the scientists found 14 different species of macroinvertebrates. In year 10, the scientists found only 2 macroinvertebrate species.
What does this change in macroinvertebrate species most likely indicate about the water quality of the river?
A. Many macroinvertebrates thrive in polluted areas, so the water quality likely increased.
B. Many macroinvertebrates are sensitive to pollution, so the water quality likely decreased.
C. Many macroinvertebrates thrive in polluted areas, so the water quality likely decreased.
D. Many macroinvertebrates are sensitive to pollution, so the water quality likely increased.
B. Many macroinvertebrates are sensitive to pollution, so the water quality likely decreased.
A piece of paper has a mass of 17 grams. When the paper is burned, a chemical change occurs, and both smoke and ashes are produced. Based on the law of conservation of mass, which statement is true?
A. The smoke has a mass of 17 grams.
B. The ashes have a mass of 17 grams.
C. The smoke and the ashes have a combined mass greater than 17 grams
D. The smoke and ashes have a combined mass of 17 grams.
D. The smoke and ashes have a combined mass of 17 grams.
Which best distinguishes an infectious disease from a noninfectious disease?
a. Infectious diseases can be cured with antibiotics; noninfectious diseases cannot.
b. Infectious diseases can be prevented with vaccines; noninfectious diseases cannot.
c. Infectious diseases can be spread from one organism to another; noninfectious diseases cannot.
d. Infectious diseases cannot be transmitted from one organism to another; noninfectious diseases can.
c. Infectious diseases can be spread from one organism to another; noninfectious diseases cannot.
Which best describes a controversial issue associated with the use of genetically modified crops?
A. the use of genetically modified crops to increase crop yields
B. the short term use of genetically modified crops in famine stricken countries
C. the development of genetically modified crops which are resistant to herbicides
D. the long term effects which may arise from the use of genetically modified crops
D. the long term effects which may arise from the use of genetically modified crops
Bees visit flowers for their nectar and in the process pick up pollen, allowing flowering plants to cross-pollinate. Which best describes this symbiotic relationship?
A. mutualism
B. commensalism
C. parasitism
D. competition
A. mutualism
Why is water clarity an important measure of water quality?
A. Clear water does not have enough nutrients.
B. Boat captains need to see the bottom for safety.
C. Underwater plants cannot get enough sunlight in cloudy water.
D. Fish don't get enough light when water is cloudy.
C. Underwater plants cannot get enough sunlight in cloudy water.
Hydrochloric acid reacts with zinc metal, creating hydrogen gas Which indicates a chemical reaction is occurring?
A. a substance melting
B. a substance evaporating
C. bubbles forming when two substances are mixed
D. temperature remaining the same when two substances are mixed
C. bubbles forming when two substances are mixed
Which best compares an epidemic and a pandemic?
a. An epidemic is caused by bacteria, while a pandemic is caused by viruses.
b. A pandemic is spread by humans, while an epidemic is spread by insects and rodents.
c. A pandemic occurs in a small region, while an epidemic occurs in a much larger region.
d. An epidemic affects a small population of humans, while a pandemic affects a large population of humans.
d. An epidemic affects a small population of humans, while a pandemic affects a large population of humans.
Which area of biotechnology would most likely create ethical issues within human society?
A. insulin production of bacteria
B. organ cloning for use in transplants
C. genetic engineering to increase crop yields
D. DNA testing for forensics at a crime scene
B. organ cloning for use in transplants
The chart below shows the human population and the fox population in the area.
Human Population Fox Population
10 60
20 45
30 30
40 10
50 5
Which best explains the relationship between the human and fox populations in the ecosystem?
A. Humans compete for the same prey as foxes, causing the fox population to decrease
B. Humans compete for the same space as foxes, causing the population to drop
C. Humans are affected by the same predators as foxes, causing both populations to change in the same way.
D. Humans are affected by the same diseases as foxes, causing both populations to change in the same way.
B. Humans compete for the same space as foxes, causing the population to drop