2.1 Two different species of bacteria attempt to infect an organism. One bacterium succeeds, while the other is destroyed by the organism's infection-fighting mechanisms. What is most likely the major difference between these two bacteria?

The bacterium that was destroyed must have had a weaker capsule than the bacterium that survived.

2.4 Can saprophytic bacteria be autotrophic?

Absolutely not. Saprophytic bacteria are decomposers.

2.6 A population of bacteria grown from a single "starter" bacterium is rather fragile. When conditions are changed, the population dies quickly. Based on what you have just learned, develop a hypothesis for why this is the case.

Because they share the same fragile DNA.

2.7 A population of bacteria reaches a steady state and then, after several days, that population actually increases dramatically. What could cause such an event?

Because of an increase of food.

2.8(continued) And another type that are resistant to high temperature (type B). Which type will be the donor and which the recipient as the population bgins to gonjugate?

Type B will be the donor and type A will be the recipient.

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Biology OYO

Module 2

Question	Answer
2.1 Two different species of bacteria attempt to infect an organism. One bacterium succeeds, while the other is destroyed by the organism's infection-fighting mechanisms. What is most likely the major difference between these two bacteria?	The bacterium that was destroyed must have had a weaker capsule than the bacterium that survived.
2.2 A bacterium is poisoned by a substance that is allowed into the interior of the cell. What bacterial component did not do its job?	The plasma membrane.
2.3 If a bacterium cannot move, what structure is it missing?	The flagellum.
2.4 Can saprophytic bacteria be autotrophic?	Absolutely not. Saprophytic bacteria are decomposers.
2.5 Can an aerobic bacterium be chemosynthetic?	Yes.
2.6 A population of bacteria grown from a single "starter" bacterium is rather fragile. When conditions are changed, the population dies quickly. Based on what you have just learned, develop a hypothesis for why this is the case.	Because they share the same fragile DNA.
2.7 A population of bacteria reaches a steady state and then, after several days, that population actually increases dramatically. What could cause such an event?	Because of an increase of food.
2.8 A population of bacteria are living in a lake. Due to volcanic activity nearby, the lake's temperature begins to increase. In the population, there are some bacteria that are resistant to low temperatures (type A).
2.8(continued) And another type that are resistant to high temperature (type B). Which type will be the donor and which the recipient as the population bgins to gonjugate?	Type B will be the donor and type A will be the recipient.
2.9 A bacterial colony is called staphylobacillus. What shape do the bacteria in the colony possess: spherical, rod-shaped, or helical?	Rod-shaped.
2.10 A bacterium has no cell wall. To what phylum does it belong?	Tenericutes.
2.11 A bacterium is classified as Gram-positive. To what phylum does it belong?	Firmicutes.
2.12 A bacterium appears red after a Gram stain. To what phylum does it belong?	Gracilicutes.
2.13 A bacterium has a cell wall that is different from both Gram-positive and Gram-negative Bacteria. To what phylum does it belong?	Mendosicutes.

Created by: LiseBrinkley

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