Handout: Practice Test
Unit 1
Supplemental Instruction
IowaStateUniversity / Leader: / Breanna King
Course: / BIOL 211 (3)
Instructor: / Dr. Colbert
Date: / 9/16/09

1. A radioactive isotope has a half-life of 1.2 billion years. As measured by the presence of the isotope and its stable decay product, a rock originally contained 10 grams of the radioactive isotope, and now contains 1.25 grams. Approximately how many years old is the rock?

  1. 10,000 years
  2. 1.2 billion years
  3. 0.3 billion years
  4. 1,000 years

2. Fossils that can be used to establish relative dates are most likely to be found in _____.

  1. Glacial till (i.e. rubble)
  2. Sedimentary rock
  3. Igneous rock
  4. Volcanic archipelagos

3. Single-celled prokaryotes had the Earth to themselves for approximately ______years.

  1. 1.5 billion years
  2. 3 billion years
  3. 150,000 years
  4. 3 million years

4. What evidence supports the hypothesis that mitochondria and plastids evolved from prokaryotic endosymbionts?

  1. They have a single circular chromosome similar ot bacterial chromosomes
  2. They have flagella similar to bacterial flagella
  3. Their ribosome’s are more like prokaryotic ribosome’s than eukaryotic ribosome’s
  4. Both a and c

5. All the members of which one of the following grups have the greatest number of characteristics in common?

  1. Class
  2. Kingdom
  3. Phylum
  4. Species

6. Bacterial cells, but not eukaryotic cells possess ______.

  1. Photosynthetic pigments
  2. A nucleoid with a circular chromosome
  3. Membrane-enclosed organelles
  4. Cell walls

7. Bacteria that use light for their energy source and CO2 for their carbon source are called

  1. Photoautotrophs
  2. Photoheterotrophs
  3. Chemoautotrophs
  4. Chemoheterotrophs

8. What is the role of heterocytes in a cyanobacterial filament?

  1. They carry out photosynthesis and nitrogen fixation
  2. They carry out only nitrogen fixation
  3. They carry out only photosynthesis
  4. They oxidize inorganic substances to obtain energy

9. Which group of bacteria is unusual in that they lack peptidoglycan in their cell walls?

  1. Spirochetes
  2. Proteobacteria
  3. Chlamydias
  4. Gram-Positive bacteria

10. Prokaryotes found inhabiting the Great Salt Lake would be

  1. Cyanobacteria
  2. Extreme halophiles
  3. Extreme Methanogens
  4. Extreme Thermophiles

11. A type of ecological relationship called _____ involves one organism,living at the expense of another organism

  1. Mutualism
  2. Commensalism
  3. Parasitism
  4. Symbiosis

12. Which clade of archaea includes most of the extremethermophiles?

  1. Euryarchaeota
  2. Crenarchaeota
  3. Korarchaeota
  4. Extremophiles

13. A coenocytic mass is a feature of what group?

  1. Gymnamoebas
  2. Plasmodial Slime Molds
  3. Anabaena
  4. Green Algae

14. Which of the following is NOT a use of diatomaceous earth?

  1. Nanotechnology
  2. Pesticide
  3. Metal finishes
  4. Reflective paint

15. The Oedogonium life cycle is considered to be…

  1. Anisogamous
  2. Isogamous
  3. Asexual
  4. Both a and c
  5. Both b and c

16. What is the structure illustrated in the picture?

  1. Coenocytic mass
  2. Body mass
  3. Psedupodium
  4. Sporangia

17. What clade do these two organisms belong to?

  1. Ciliates
  2. Cyanobacteria
  3. Green Algae
  4. Spirochetes

18. What organism would be found in the nodules illustrated?

  1. Parabasilids
  2. Rhizobium
  3. Euglenozoans
  4. Trypanosomes