Biology Toughest Practice Test: Quiz!

76 Questions | Total Attempts: 410

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Biology Toughest Practice Test: Quiz! - Quiz

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Questions and Answers
  • 1. 
    The table below shows the abundance of some greenhouse gases in the atmosphere. Identify the most abundant greenhouse gas and state one human activity that is a source of this gas. [1]
  • 2. 
    The United States government does not allow travelers from foreign countries to bring plants, fruits, vegetables, animals, or other living organisms into this country. State one biological reason for keeping these out of the United States. [1]
  • 3. 
    Birds colliding with aircraft either on the ground or in the air create problems for the Air Force. An organization known as BASH (Bird Aircraft Strike Hazard) studied the impact of birds colliding with aircraft. In 2001, there were 3854 bird collisions reported at a total cost to the Air Force of over 31 million dollars in damage—approximately eight thousand dollars per collision. August, September, and October were the busiest months with 1442 collisions. Nearly 50% of all these collisions occurred in the airfield environment, an environment that can most easily be controlled. Is the problem with birds and aircraft limited to birds living on or near airport grounds? Support your answer using information from the passage. [1]
  • 4. 
    Birds colliding with aircraft either on the ground or in the air create problems for the Air Force. An organization known as BASH (Bird Aircraft Strike Hazard) studied the impact of birds colliding with aircraft. In 2001, there were 3854 bird collisions reported at a total cost to the Air Force of over 31 million dollars in damage—approximately eight thousand dollars per collision. August, September, and October were the busiest months with 1442 collisions. Nearly 50% of all these collisions occurred in the airfield environment, an environment that can most easily be controlled. State one possible reason that the greatest number of bird collisions occurs during August, September, and October. [1]
  • 5. 
    The Control of Transpiration Plants normally lose water from openings (stomates) in their leaves. The water loss typically occurs during daylight hours when plants are exposed to the Sun. This water loss, known as transpiration, is both beneficial and harmful to plants. Scientists believe wind and high temperatures increase the rate of transpiration, but the size of each stomate opening can be regulated. Reducing the size of the openings during drought conditions may help reduce the dehydration and wilting that would otherwise occur. A leaf may lose more than its own weight in water each day. Transpiration also lowers the internal temperature of the leaf as water evaporates. On hot days, temperatures in the leaves may be from 3° to 15°C cooler than the outside air. With stomates open, vital gases may be exchanged between the leaf tissues and the outside environment. Researchers have also found many plants that use another response when leaf temperatures rise. Special molecules known as heat shock proteins are produced by plant cells and help to hold enzymes in their functional shapes. 50 State one way transpiration is beneficial to plants. [1]
  • 6. 
    Identify two of the “vital gases” that are exchanged between leaf tissues and the outside environment. [1]
  • 7. 
    Explain why it is important for plants to “hold enzymes in their functional shapes.” [1]
  • 8. 
    The graph below shows the growth of a population of coyotes in a wilderness area. State one possible cause for the population decrease at X. [1]
  • 9. 
    The information in the chart below represents the sex chromosome arrangement in humans and birds. Sex chromosomes contain genes involved in sex determination. In humans, it is the male gamete that is responsible for determining the sex of the offspring. Identify which type of gamete determines the sex of the offspring in birds. Support your answer. [1] Type of Gamete: _____________________________________
  • 10. 
    Help for Aging Memories As aging occurs, the ability to form memories begins to decrease. Research has shown that an increase in the production of a certain molecule, BDNF, seems to restore the processes involved in storing memories. BDNF is found in the central nervous system and seems to be important in maintaining nerve cell health. Researchers are testing a new drug that seems to increase the production of BDNF. 56 Design an experiment to test the effectiveness of the new drug to increase the production of BDNF in the brains of rats. In your answer, be sure to: • state the hypothesis your experiment will test [1] • describe how the control group will be treated differently from the experimental group [1] • identify two factors that must be kept the same in both the experimental and control groups [1] • identify the dependent variable in your experiment [1]
  • 11. 
    Rabbits eat plants and in turn are eaten by predators such as foxes and wolves. A population of rabbits is found in which a few have a genetic trait that gives them much better than average leg strength. Predict how the frequency of the trait for above average leg strength would be expected to change in the population over time. Explain your prediction. [1]
  • 12. 
    Rabbits eat plants and in turn are eaten by predators such as foxes and wolves. A population of rabbits is found in which a few have a genetic trait that gives them much better than average leg strength. State what is likely to happen to the rabbits in the population that do not have the trait for above average leg strength. [1]
  • 13. 
    It was later discovered that the rabbits born with the trait for above average leg strength also inherited the trait for poor eyesight. Taking into account this new information, explain how your predictions would change. Support your answer. [1]
  • 14. 
    Bacterial resistance to antibiotic treatment is becoming an increasing problem for the medical community. It is estimated that 70% of bacteria that cause infections in hospitals are resistant to at least one of the drugs used for treatment. Dangerous strains of tuberculosis (TB) have emerged that are resistant to several major antibiotic drugs. While drug-resistant TB is generally treatable, it requires much longer treatments with several antibiotics that are very expensive. Explain the loss of effectiveness of antibiotic drugs. In your explanation, be sure to: • identify the genetic event that resulted in the original antibiotic resistance in some strains of bacteria [1] • explain how the overuse of antibiotics can increase bacterial resistance [1]
  • 15. 
    The average life expectancy of humans in the United States increased from 63.3 years in 1943 to 77.6 years in 2003. This, combined with other factors, has led to an increase in population. State one factor that contributed to the increase in life expectancy in the United States. [1]
  • 16. 
    The average life expectancy of humans in the United States increased from 63.3 years in 1943 to 77.6 years in 2003. This, combined with other factors, has led to an increase in population. State one way the increase in population affects other species. [1]
  • 17. 
    The diagram below represents a cell found in some complex organisms. The enlarged section represents an organelle, labeled X, found in this cell. Describe the function of organelle X and explain how it is important to the survival of the cell. In your answer, be sure to: • identify organelle X [1] • state the process that this organelle performs [1] • identify the two raw materials that are needed for this process to occur [1] • identify one molecule produced by this organelle and explain why it is important to the organism [2]
  • 18. 
    The Arctic National Wildlife Refuge The Arctic National Wildlife Refuge (ANWR) in Alaska is the last great wilderness in America. Many migratory animals stop there to feed and rest. This region also supports an abundance of wildlife, including various types of vegetation, herbivores such as musk oxen and reindeer, and carnivores such as polar bears and wolves. Wolves often hunt reindeer for food. State the effect on the size of the wolf population if the amount of vegetation were to drop suddenly. Support your answer. [1]
  • 19. 
    The amino acid sequences of three species shown below were determined in an investigation of evolutionary relationships. Based on these data, which two species are most closely related? Support your answer. [1]
  • 20. 
    A student carried out a lab activity where she was asked to squeeze a clothespin as many times as she could in one minute and record that number. She immediately tried the same activity again, thinking she could do better the second time, but the number was lower. She immediately tried again, but the number was lower still. State one reason why she continued to get lower numbers, even though she tried to increase the number of squeezes several times. [1]
  • 21. 
    Scientists attempted to determine the evolutionary relationships between three different plant species, A, B, and C. In order to do this, they examined the stems and DNA of these species. Diagram 1 repre- sents a microscopic view of the cross sections of the stems of these three species. DNA was extracted from all three species and analyzed using gel electrophoresis. The results are shown in diagram 2. Based on the data they collected, they drew diagram 3 to represent the possible evolutionary relationships. State why the evolutionary relationships shown in diagram 3 are not supported by the data provided by the stem cross sections in diagram 1. [1]
  • 22. 
    Explain how the DNA banding pattern in diagram 2 supports the evolutionary relationships between the species shown in diagram 3. [1]
  • 23. 
    Explain why information obtained through DNA analysis is a more reliable indicator of evolutionary relationships than observations of stem cross sections with a microscope. [1]
  • 24. 
    Describe the proper way to add a saltwater solution to the cells without removing the coverslip. [1]
  • 25. 
    Why is a mushroom considered a heterotroph?
    • A. 

      (1) It manufactures its own food

    • B. 

      (2) It divides by mitosis.

    • C. 

      (3) It transforms light energy into chemical energy.

    • D. 

      (4) It obtains nutrients from its environment.

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