Le August 2009 Multiple Choice

43 Questions | Total Attempts: 213

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Multiple Choice Quizzes & Trivia

Living Environment Multiple choice from August 2009. Make your selections. GOOD LUCK.


Questions and Answers
  • 1. 
    Organisms that are able to manufacture organic nutrients from substances in the abiotic environment are classified as 
    • A. 

      Heterotrophs

    • B. 

      Fungi

    • C. 

      Predators

    • D. 

      Autotrophs

  • 2. 
    Which factor would have the greatest effect on the flow of energy into an ecosystem? 
    • A. 

      A large decrease in the amount of sunlight available

    • B. 

      A large increase in the number of carnivores

    • C. 

      A small increase in the number of decomposers

    • D. 

      A small decrease in the amount of minerals available

  • 3. 
    Which structures carry out life functions within cells? 
    • A. 

      Tissues

    • B. 

      Organ systems

    • C. 

      Organelles

    • D. 

      Organs

  • 4. 
    Which process is most directly responsible for maintaining internal stability in an organism when its environment is constantly changing? 
    • A. 

      Digestion

    • B. 

      Feedback

    • C. 

      Reproduction

    • D. 

      Evolution

  • 5. 
    The function of a cell depends primarily on its    
    • A. 

      Life span

    • B. 

      Color

    • C. 

      Structure

    • D. 

      Movement

  • 6. 
    In some cases, humans have chosen to mate certain individual farm animals within a species. For example, by allowing only the largest cattle to reproduce over many generations, strains of very large cattle have been produced. This process is known as 
    • A. 

      Natural selection

    • B. 

      Direct harvesting

    • C. 

      Selective breeding

    • D. 

      Dynamic equilibrium

  • 7. 
    A boy inherits genes for tallness, but his growth is limited as a result of poor nutrition. This is an example of 
    • A. 

      An inherited disorder

    • B. 

      Environmental influence on gene expression

    • C. 

      Expression of a hidden trait

    • D. 

      A characteristic controlled by more than one pair of genes

  • 8. 
    The sickle-cell trait is an inherited condition resulting from the presence of abnormal molecules of the protein hemoglobin in red blood cells. A person with the sickle-cell trait may have a child with the same condition because the child receives from the parent 
    • A. 

      Abnormal red blood cells

    • B. 

      Abnormal hemoglobin molecules

    • C. 

      A code for the production of abnormal hemoglobin

    • D. 

      A code for the production of abnormal amino acids

  • 9. 
    The sorting and recombining of genes during meiosis and fertilization usually leads to the production of 
    • A. 

      Gametes with many copies of the same chromosome

    • B. 

      Embryos with traits identical to those of all other members of the species

    • C. 

      Zygotes with the genetic information to produce only females

    • D. 

      Offspring with some traits that did not appear in their parents

  • 10. 
    Which situation would most likely produce a gene mutation in a squirrel? 
    • A. 

      The squirrel stops using its claws for digging.

    • B. 

      The squirrel is exposed to radiation for several days.

    • C. 

      Oak trees gradually become less common.

    • D. 

      The weather becomes wetter for a short period of time.

  • 11. 
    Which row in the chart below best describes what happens when some DNA bases are deleted from a gene? 
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 12. 
    The diagram below represents a technique currently used by scientists in the field of biotechnology.     Which statement describes a possible outcome of this technique?    
    • A. 

      The bacterium is able to produce a human hormone.

    • B. 

      It allows the bacterium to grow in humans, since it contains a human gene.

    • C. 

      It allows humans to become immune to an infection from this type of bacteria.

    • D. 

      The bacterium can now produce human cells identical to cells of the DNA donor.

  • 13. 
    When antibiotics were first developed, most infectious diseases could be controlled by them. Today, certain bacteria are resistant to many antibiotics. One possible explanation for this change is that 
    • A. 

      The antibiotics killed most of the bacteria that did not have a genetic variation for resistance

    • B. 

      The bacteria needed to change in order to produce more antibiotics

    • C. 

      Some of the bacteria learned how to resist the antibiotics

    • D. 

      Antibiotics have become weaker over the years

  • 14. 
    Thousands of genetically identical trees have been discovered growing in a remote, undisturbed mountain area in Colorado. These trees are most likely the result of 
    • A. 

      Genetic engineering

    • B. 

      Asexual reproduction

    • C. 

      Meiotic cell division

    • D. 

      Biotechnology

  • 15. 
    The ability of the human body to keep blood-sugar levels within a fairly narrow range, despite the intake of meals high in carbohydrates, is an example of 
    • A. 

      Active transport

    • B. 

      Genetic recombination

    • C. 

      Homeostasis

    • D. 

      Digestion

  • 16. 
    A large number of sperm cells are produced by males every day. This large number of sperm cells increases the chance that 
    • A. 

      At least one sperm cell will be reached when the eggs swim toward the sperm cells in the ovary

    • B. 

      Several sperm cells will unite with an egg so the fertilized egg will develop properly

    • C. 

      Some of the sperm cells will survive to reach the egg

    • D. 

      Enough sperm cells will be present to transport the egg from where it is produced to where it develops into a fetus

  • 17. 
    Which statement best describes the relationship between the blood of a human fetus and the blood of the mother? 
    • A. 

      Their blood systems are separate only at certain times in development and connected at other times.

    • B. 

      The blood flows directly from the mother into the fetus.

    • C. 

      Their blood systems are separate and no materials are exchanged.

    • D. 

      Their blood systems are separate, but certain materials pass from one to the other.

  • 18. 
    To replace burned skin, doctors can successfully transplant replacement skin taken from another part of the body of the burn victim. Which state- ment best explains why the transplanted skin is not rejected? 
    • A. 

      The transplanted skin is damaged, making the immune system nonfunctional.

    • B. 

      The antigens of the replacement skin are the same as those of the damaged skin.

    • C. 

      Burn victims lose so much blood that white blood cells cannot cause an immune response.

    • D. 

      There is no blood supply to the skin, so mixing of antigens does not occur.

  • 19. 
    The soil on a farm can very quickly become depleted of the minerals essential to plants because harvesting of crops can interfere with the 
    • A. 

      Reproductive cycles of animals

    • B. 

      Recycling of inorganic compounds

    • C. 

      Flow of energy

    • D. 

      Transport of groundwater

  • 20. 
    A vaccine used against an infectious disease may contain 
    • A. 

      Specialized blood cells

    • B. 

      Toxic enzymes

    • C. 

      A variety of antibiotics

    • D. 

      Weakened pathogens

  • 21. 
    What will most likely occur if two different plant species compete for the same requirements in an ecosystem? 
    • A. 

      They will usually develop different requirements.

    • B. 

      One species may adapt to a different environment.

    • C. 

      One species may be eliminated from that ecosystem.

    • D. 

      They will alter the environment so that they can both survive in that ecosystem.

  • 22. 
    Some of the energy taken in by an organism is not available to other organisms in a food web. Energy that is not available to other organisms in a food web is energy that is 
    • A. 

      Stored in the remains of a dead animal

    • B. 

      Lost to the environment as heat

    • C. 

      Stored in eggs produced during sexual reproduction

    • D. 

      Produced in muscle tissue during the growth of an organism

  • 23. 
    The relationship that exists when athlete’s foot fungus grows on a human is an example of 
    • A. 

      Predator/prey

    • B. 

      Producer/consumer

    • C. 

      Parasite/host

    • D. 

      Decomposer/autotroph

  • 24. 
    If an ecosystem is changed through a natural disaster, organisms will have the best chance of survival if 
    • A. 

      Their environment has few abiotic factors

    • B. 

      The organisms are large

    • C. 

      The population size is small

    • D. 

      Their species exhibits genetic variation

  • 25. 
    In state forests and parks containing varieties of flowering trees and shrubs, there are signs that say “Take nothing but pictures, leave nothing but footprints.” These signs are necessary because 
    • A. 

      Humans can destroy habitats by removing flowering trees and shrubs

    • B. 

      All animals feed directly on flowering shrubs that may be removed by people

    • C. 

      Removal of flowering trees and shrubs will increase biodiversity

    • D. 

      Flowering shrubs grow best in state forests and parks

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