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					Unit 4 Practice Test

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

        1. Dogs and wolves are members of
           A. the same family.
           B. the same genus.
           C. different species.
           D. All of the above
        2. An ecosystem consists of
           A. a community of organisms.                       C. the soil, water, and weather.
           B. energy.                                         D. All of the above
        3. The primary producers in a grassland ecosystem would most likely be
           A. insects.                                   C. grasses.
           B. bacteria.                                  D. algae.

        4. Refer to the illustration above. Level A is composed of
           A. carnivores.                                  C. producers.
           B. herbivores.                                  D. omnivores.
        5. Animals that feed on plants are at least in the
           A. first trophic level.                            C. third trophic level.
           B. second trophic level.                           D. fourth trophic level.
        6. Because energy diminishes at each successive trophic level, few ecosystems can contain more
           A. two trophic levels.                         C. five trophic levels.
           B. four trophic levels.                        D. eight trophic levels.
        7. Which of the following animals would most likely be found in a temperate deciduous forest?
           A. monkeys                                    C. deer
           B. caribou                                    D. leopards
        8. Removing a flower’s stigma would initially affect
           A. fertilization.                              C. pollination.
           B. seed production.                            D. seed dispersal.
        9. In angiosperms, immediately following pollination
     A. the seed develops.                           C. fertilization occurs.
     B. an egg cell is formed.                       D. the pollen tube begins to form.

10. Organism B is
    A. radially symmetrical.                         C. unilaterally symmetrical.
    B. bilaterally symmetrical.                      D. nonsymmetrical.
11. Cephalization
    A. is a feature of most invertebrates, including the sponges.
    B. is characterized by the concentration of sensory organs in the anterior end.
    C. occurs in marine protozoa.
    D. results when the brain does not develop properly.
12. Hermaphroditic organisms
    A. reproduce only by asexual means.
    B. produce both eggs and sperm.
    C. have gemmules that are fertilized by amoebocytes.
    D. possess only male amoebocytes.
13. All of the following are characteristics of mollusks except
    A. a pseudocoelomate body plan.                  C. a complete digestive tract.
    B. bilateral symmetry.                           D. an open circulatory system.
14. In what way are lobsters similar to spiders?
    A. They both have jointed appendages.            C. They both have segmented bodies.
    B. They both have exoskeletons.                  D. All of the above
15. Characteristics of the arthropods include
    A. segmentation.                                 C. jointed appendages.
    B. a chitinous exoskeleton.                      D. All of the above
16. All vertebrates are characterized by
    A. radial symmetry.                              C. open circulatory system.
    B. bilateral symmetry.                           D. exoskeleton.
17. Although adapted to land, toads must have access to a watery environment in order to
    A. obtain food.                               C. reproduce.
    B. excrete wastes.                            D. All of the above
18. Which of the following is usually characteristic of reproduction in a terrestrial environment?
           A. external fertilization                       C. water-permeable eggs with no shells
           B. internal fertilization                       D. None of the above
      19. Mammals whose offspring remain inside the mother until development is complete are called
          A. placental mammals.                       C. marsupials.
          B. monotremes.                              D. All of the above
      20. The placental mammals are animals that
          A. nurse their young with milk.                  C. give birth to live young.
          B. have body hair.                               D. All of the above
      21. Mammals that lay eggs are
          A. placental mammals.                            C. monotremes.
          B. pouched mammals.                              D. semi-pouched mammals.
      22. Kangaroos and opossums are
          A. marsupials.                                   C. macroscelidea.
          B. monotremes.                                   D. placentals.
      23. Gonorrhea can be acquired
          A. by sharing glassware and dishes with infected persons.
          B. through sexual contact with infected persons.
          C. by swimming in infected swimming pools.
          D. through poor personal hygiene habits.
      24. gonorrhea infection in females : no symptoms ::
          A. gonorrhea infection : warts                  C. chlamydia infection: chancre
          B. syphilis infection : pus discharge           D. genital herpes : fever blisters

Complete each sentence or statement.

      25. The unique two-word name for a species is its ____________________ name.

      26. Classes with similar characteristics are assigned to a(n) ____________________.

      27. ____________________ is a rank system of groups that increase in inclusiveness.

      28. Homologous structures are found in organisms that once shared a(n) ____________________

      29. An organism that eats a primary consumer is called a(n) ____________________ consumer.

      30. The variety of organisms in a community is called ____________________.

      31. A major biological community that occurs over a large area of land is called a(n)
32. The flower in the diagram above is an example of a(n) ____________________ flower.

33. Organisms that have left and right halves that mirror each other when divided by an imaginary
    longitudinal plane are said to have ____________________ symmetry.

34. Animals without backbones are called ____________________.

35. Annelids, arthropods, echinoderms, and chordates all have ____________________ bodies.

36. Roundworms are members of the phylum ____________________.

37. A lobster is a member of the phylum ____________________.

38. A sand dollar is a member of the phylum ____________________.

39. Invertebrate chordates are chordates that lack ____________________.

40. The backbone provides ____________________ for and protects the dorsal nerve cord.

41. Reptiles, whose body temperature changes with the temperature of their surroundings, are known
    as ____________________.

42. AIDS is caused by a virus called ____________________.
Unit 4
Answer Section


      1.   D
      2.   D
      3.   C
      4.   C
      5.   B
      6.   C
      7.   C
      8.   C
      9.   D
     10.   A
     11.   B
     12.   B
     13.   A
     14.   D
     15.   D
     16.   B
     17.   C
     18.   B
     19.   A
     20.   D
     21.   C
     22.   A
     23.   B
     24.   D


     25.   scientific
     26.   phylum
     27.   Taxonomy/Classification
     28.   common
     29.   secondary
     30.   biodiversity
     31.   biome
     32.   complete
     33.   bilateral
     34.   invertebrates
     35.   segmented
     36.   Nematoda
     37.   Arthropoda
     38.   Echinodermata
39.   backbones
40.   support
41.   cold blooded
42.   HIV

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