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BIOS 100 Final 2
1. Algae are commonly grouped by their type of:
Answer Pigment
- Support for the endosymbiotic hypothesis is provided by which of the following?:
Answer -double membranes around mitochondria and chloroplasts -mitochondria and chloroplasts have their own genomes -mitochondria and chloroplast ribosomes are encoded by genes that are very similar to bacterial ribosome genes
3. Which of the following statements is incorrect for all viruses?:
Answer viruses have envelopes
4. Viroids and prions are alike in that both are infectious:
Answer Molecules
5. A chain of spherical bacterial cells is called a:
Answer Streptococcus
6. Cyanobacteria are important producers as:
Answer Photoautotrophs
- Bacteria that secrete digestive enzymes into their surroundings in order to decompose
nonliving organic matter are called:
Answer Saprotrophs
8. Without bacteria in the environment:
Answer -adequate amounts of carbon would not be available to living organisms -plants would not be able to grow due to lack of nitrogen -bioremediation would have limited use as a tool to clean up pollutants -there would be a shortage of decomposer organisms 1 / 2
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- One group of protozoans which are non-motile, produce spores, and have disease-causing
species is the:
Answer Sporozoans
10. Naked strands of RNA not covered by a capsid are:
Answer Viroids
11. What kind of molecule is a viroid?:
Answer RNA
12. Which statement about bacteria is incorrect?:
Answer all bacteria are pathogenic to humans
13. Which of these doesn't belong in any domain of life?:
Answer Viruses
14. Which of the following are acellular?:
Answer Prions
15. Which group of organisms are viroids most likely to parasitize?:
Answer Plants
- The idea that mitochondria may have resulted when a nucleated cell en- gulfed aerobic
bacteria is known as the:
Answer endosymbiotic hypothesis
17. What feature enables the paramecium to move?:
Answer Cilia
18. Which of the following is an example of an emerging virus?:
Answer ebola virus
- Certain prokaryotes can withstand drying and hotter temperatures be- cause of their
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