Module 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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1a. Pathogen | show 🗑
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1b. Saprophyte | show 🗑
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show | 1c. An organism that feeds on a living host.
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show | 1d. An organism that requires oxygen.
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show | 1e. An organism that does not require oxygen.
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show | 1f. A state in which members of a population die as quickly as new members are born.
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show | 1g. Population growth that is unhindered because of the abundance of resources for an ever-increasing population.
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show | 1h. Population growth that is controlled by limited resources.
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1i. Conjugation | show 🗑
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1j. Plasmid | show 🗑
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show | 1k. The transfer of a DNA segment from a nonfunctional donor cell to that of a functional recipient cell.
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show | 1l. The process in which infection by a virus results in DNA being transferred from one bacterium to another.
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show | 1m. The DNA and other essential parts of a bacterium coated with several hard layers.
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1n. Strains | show 🗑
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show | a.Plasma membrane b.Flagellum c.Capsule d.Deoxyribonucleic acid e.Cytoplasm f.Cell wall g.Fimbria h.Ribosome
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show | a.Plasma membrane-Wall of chemicals which regulate what the bacterium takes in from the outside world. b.Flagellum-Used for locomotion. c.Capsule-Adheres bacterium to surfaces. d.DNA-Contains all required information for life of the bacterium.
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show | e.Cytoplasm-Semifluid substance that supports the DNA and ribosomes. f.Cell wall-Holds the contents of the bacterium together. g.Fimbria-Fibrous bristles used for grasping. h.Ribosome-Makes proteins
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4. What is the most popular means by which bacteria obtain food? | show 🗑
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show | Heterotrophic because it feeds on a living host.
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show | A. DNA loop is attached to a point on the plasma membrane. B. The DNA is then copied. C. Cell wall elongates, separating the two strands of DNA. D. New cell wall material and plasma membrane begin to grow, closing the two strands off from each other.
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6. (continued) | show 🗑
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7. A sample of food is dehydrated, which kills all of the bacteria. Then bacteria-free water is added to the food in a bacteria-free environment. Nevertheless, microscopic investigations indicate that bacteria are in the food. How did they get there? | show 🗑
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show | Exponential growth.
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9. A population of bacteria experiences logistic growth. What can you say about the resources of their environment? | show 🗑
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10. Even though genetic recombination among bacteria does not result in offspring, it can significantly affect the growth of the population. Why? | show 🗑
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show | Coccus (spherical), bacillus (rod-shaped), and spirillem (helical).
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12. A bacterium is heterotrophic and Gram-negative. To what phylum and class does it belong? | show 🗑
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show | Phylum Firmicutes and class Thallobacteria.
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14. A bacterium has no cell wall. To what phylum and class does it belong? | show 🗑
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show | Phylum Mendosicutes and class Archaebacteria.
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16. In the six-kingdom classification system, what replaces kingdom Monera? | show 🗑
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17. What conditions are ideal for most bacteria to grow and reproduce? | show 🗑
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show | Exposing the food to extreme heat or radiation, freezing the food, and dehydration.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
LiseBrinkley
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