Biology EOC Practice Questions (Practice Mode)

96 Questions | Total Attempts: 65

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Biology EOC Practice Questions (Practice Mode)

Questions and Answers
  • 1. 
    Which group(s) contain organsims that can be classified as primary producers?
    • A. 

      Monerans only

    • B. 

      Protists only

    • C. 

      Monerans and protists

    • D. 

      Viruses and monerans

  • 2. 
    Hummingbirds transfer pollen from one flower to another while feeding. What plant structure contains the pollen?
    • A. 

      Carpel

    • B. 

      Petal

    • C. 

      Sepal

    • D. 

      Stamen

  • 3. 
    In addition to the reproductive system, which body system is most directly essential to the production of gametes and offspring?
    • A. 

      Circulatory

    • B. 

      Endocrine

    • C. 

      Immune

    • D. 

      Nervous

  • 4. 
    Which group(s) contain organsims that can be classified as primary producers?
    • A. 

      Monerans only

    • B. 

      Protists only

    • C. 

      Monerans and protists

    • D. 

      Viruses and monerans

  • 5. 
    Ella told her sister the sun would set at 6:30 p.m. and there would be a full moon on Thursday night. Under which basic assumption of science is she operating?
    • A. 

      Nature is orderly.

    • B. 

      Knowledge is superior to ignorance.

    • C. 

      Nothing is self-evident.

    • D. 

      All phenomena have natural causes.

  • 6. 
    Ming is having trouble sleeping and decides to participate in a study to determine whether a certain medication helps people sleep. There are 30 volunteers, each of whom is assigned to 1 of 2 groups. Volunteers in group 1 are given the medication, and volunters in group 2 are given a placebo (a pill with no medication). Which step is important in order to ensure scientifically valid results?
    • A. 

      Assigning the subjects to groups at random

    • B. 

      Assigning all of the subjects with sleeping problems to the placebo group

    • C. 

      Telling subjects if they are receiving the medicine or the placebo

    • D. 

      Ensuring that the researchers can determine which subjects are getting the medicine

  • 7. 
    Edison studies the effects of temperature on starch digestion in a test tube. He adds 2 g of starch and 1 mL of enzyme suspension to a test tube and incubates it at 25oC for 20 min. To accurately test the effects of temperature, Edison should begin a second test with 2 g of starch in a test tube and continue with which set of conditions?
    • A. 

      1 mL of enzyme suspension incubated at 25oC for 10 min

    • B. 

      1 mL of enzyme suspension incubated at 37oC for 20 min

    • C. 

      2 mL of enzyme suspension incubated at 25oC for 20 min

    • D. 

      2 mL of enzyme suspension incubated at 37oC for 10 min

  • 8. 
    Sunee and Jamila grow 2 distinct strains of E. coli bacteria following appropriate lab procedures. In Experiment 1, they use a new culture of Strain X and a 30-day old culture of Strain Y. In Experiment 2, they use a new culture of Strain Y and a 30-day old culture of Strain X. Sunee and Jamila measure the number of bacterial colonies and record the data in these graphs. What is the most accurate conclusion about the growth rate of the bacteria?
    • A. 

      Strain X grows faster than Strain Y regardless of the culture's age.

    • B. 

      Strain Y grows faster that Strain X regardless of the culture's age.

    • C. 

      The 30-day old culture grows faster regardless of the strain.

    • D. 

      The new culture grows faster regardless of the strain.

  • 9. 
    A student wants to determine whether temperature affects the rate at which mold grows on bread. The student puts one piece of bread inside a Petri dish, closes the lid, and places the Petri dish in the refrigerator. Which treatment would be the best comparison for this experiment?
    • A. 

      Placing another piece of bread in an open Petri dish in the same refrigerator

    • B. 

      Placing another piece of bread in a closed Petri dish in the same refrigerator

    • C. 

      Placing another piece of bread in an open Petri dish on the countertop

    • D. 

      Placing another piece of bread in a closed Petri dish on the countertop

  • 10. 
    These diagrams represent different stages of animal cell division. From start to finish, what is the correct order of the stages?
    • A. 

      2, 4, 3, 1

    • B. 

      2, 3, 4, 1

    • C. 

      3, 2, 1, 4

    • D. 

      3, 1, 2, 4

  • 11. 
    What occurs during metaphase I of meiosis?
    • A. 

      Centromeres of replicated chromosomes line up along the cell’s equator.

    • B. 

      Centromeres divide as sister chromatids move toward opposite poles of the cell.

    • C. 

      Homologous chromosome pairs line up along the cell’s equator.

    • D. 

      Homologous chromosomes move toward opposite poles of the cell.

  • 12. 
    In humans, pigmented skin is dominant to non-pigmented skin (albinism). What is the genotype of an individual with albinism?
    • A. 

      Carrier

    • B. 

      Heterozygous

    • C. 

      Homozygous dominant

    • D. 

      Homozygous recessive

  • 13. 
    Lions and tigers both belong to genus Panthera., Cheetahs belong to the genus Achinonyx. Scientists group these 3 types of cats together at the next taxonomic level. What is the most specific taxonomic level that lions, cheetahs, and tigers share?
    • A. 

      Class

    • B. 

      Family

    • C. 

      Kingdom

    • D. 

      Order

  • 14. 
    In the following food chain, assuming that the producer contains 180,000 J of energy, how much energy would be able to be transferred to the tertiary consumer? Plant --> Mouse --> Snake --> Owl --> Fungus
    • A. 

      180 J

    • B. 

      18,000 J

    • C. 

      1,800 J

    • D. 

      18 J

  • 15. 
    When a new volcanic island forms, the pioneer species is the first species to successfully inhabit the island. Which organism is the most likely candidate for a pioneer species?
    • A. 

      A seagull hatched from an egg laid on the island

    • B. 

      A palm tree grown from a coconut that washed onto shore

    • C. 

      Lichen spores deposited on rocks by the wind

    • D. 

      Insect larvae carried on a piece of driftwood

  • 16. 
    If a football field in the taiga is abandoned, which group of organisms will most likely be part of the resulting climax community?
    • A. 

      Apple tree, deer, and wolf

    • B. 

      Cactus, snake, and hawk

    • C. 

      Grass, mouse, and coyote

    • D. 

      Pine tree, moose, and bear

  • 17. 
    A flagellated protozoan lives within the intestines of a termite and helps it digest wood. What type of relationship most likely exists between the protozoan and the termite?
    • A. 

      Competitive

    • B. 

      Mutualistic

    • C. 

      Parasitic

    • D. 

      Predatory

  • 18. 
    In a classic study of population growth, G.F. Gause obtained data on growth rates of 2 species of Paramecium, a common ciliate protozoan. The 2 species grew in separate cultures. The graph shows his results. According to these data, which is the most accurate comparison of the 2 species' growth rates.
    • A. 

      Both show exponential growth, but P. caudatum has a higher rate of increase.

    • B. 

      Both show logistic growth, but P. caudatum has a higher rate of increase.

    • C. 

      P. caudatum shows exponential growth, but P. bursaria shows logistic growth.

    • D. 

      P. bursaria shows exponential growth, but P. caudatum shows logistic growth.

  • 19. 
    The presence of what cellular structure distinguishes a plant cell from an animal cell?
    • A. 

      Cell membrane

    • B. 

      Chloroplast

    • C. 

      Mitochondrion

    • D. 

      Nucleus

  • 20. 
    Thylakoid membranes within chloroplasts contain chlorophyll. The Calvin cycle occurs in the stroma of the chloroplasts. How are the processes occurring within the Calvin cycle and the thylakoid membrane connected?
    • A. 

      The Calvin cycle uses high-energy molecules formed within the thylakoid membrane to convert carbon dioxide into sugar molecules.

    • B. 

      The Calvin cycle uses sugar molecules formed within the thylakoid membrane to generate high-energy molecules.

    • C. 

      The processes in the thylakoid membrane use high-energy molecules formed during the Calvin cycle to convert carbon dioxide into sugar molecules.

    • D. 

      The processes in the thylakoid membrane use sugar molecules formed during the Calvin cycle to generate high-energy molecules.

  • 21. 
    Plant cells contain both a cell wall and a cell membrane. What is the composition of the cell wall and where is it located in relation to the cell membrane?
    • A. 

      Cellulose, inside the cell membrane

    • B. 

      Cellulose, outside the cell membrane

    • C. 

      Glucose, inside the cell membrane

    • D. 

      Glucose, outside the cell membrane

  • 22. 
    In pea plants, purple flowers are dominant to white flowers and tall stems are dominant to short stems. If two heterozygotes for both height and flower color are crossed, what is the probability of having short stemmed pea plants with purple flowers?
    • A. 

      9/16

    • B. 

      1/4

    • C. 

      3/16

    • D. 

      1/16

  • 23. 
    Lazzaro Spallanzani and Louis Pasteur both performed experiments hoping to disprove spontaneous generation. What conditions existed in Pasteur's experiment that did not exist in Spallanzani's?
    • A. 

      Air could enter the flasks, but no microorganisms could enter.

    • B. 

      No air could enter the flasks, but microorganisms could enter.

    • C. 

      Neither air nor microorganisms could enter the flasks.

    • D. 

      Both air and microorganisms could enter the flasks.

  • 24. 
    Which criterion is NOT necessarily true of a trait that has evolved through natural selection?
    • A. 

      It is heritable.

    • B. 

      It varies among individuals.

    • C. 

      It increases individuals' life spans.

    • D. 

      It influences individuals' reproductive success.

  • 25. 
    What accounts for genetic biodiversity existing in modern multicellular organisms?
    • A. 

      Mutations in gametes are passed to offspring.

    • B. 

      Protein mutations cause DNA changes, creating new species.

    • C. 

      Genetic mutations form when similar species mate and reproduce.

    • D. 

      Somatic cell DNA mutations create new phenotypes in the population.

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