Recitation 12 . Covers lectures April 2 - 7

1.What is not a characteristic of gram positive bacteria?

A) reacts with Gram stain to appear purple

B) have two plasma membranes

C) Single peptidoglycan layer

D) Have a plasma membrane and a cell wall

2. Which best characterizes autotrophic chemosynthetic bacteria?

A) can use CO₂ as carbon source

B) can use glucose as carbon source

C) Obtain energy (ATP) from the oxidation of inorganic compounds

D) Energy source is the same as carbon source

E) A & C correct

3. What is the morpholgical shape of S. aureus?

A) Coccus

B) Spirochetes

C) Vibrio

D) bacillus

4. Cyanobacteria use light as source of energy and CO₂ as carbon source. What type of bacteria are they?

A) Photoautotrophs

B) Chemoautotrophs

C) Photoheterotrophs

D) Chemohetereotrophs

5. Bacterial metabolism: Explain the three different mechanisms by which bacteria can produce ATP

6.Which of the following is not a group of photosynthetic bacteria?

A) the green bacteria

B) the purple bacteria

C) the cyanobacteria

D) all of these are a part of photosynthetic bacteria

7. All of the following is true of the genus Pseudomonas except:

A) they are able to use a wide variety of organic compounds as carbon source

B) most species produce exotoxins

C) some species are plant pathogens

D) they are gram-negative rods

E) most species lack hydrolytic enzymes, and are unable to breakdown polymeric nutrients, such as protein

8. What makes up an individual’s life history?

A) reproduction time

B) number of offsprings

C) life cycle

D) reproductive value

E) mortality rate

9. In a life table the number of individuals alive beginning of the 1-year to the 2-year age interval is 600. During this interval 200 individuals die. The mortality rate for this interval is:

A).66

B) 400

C) 200

D).33

E)600

10. What is the reproductive value and how does it relate to natural selection?

11. Where would exponential growth be appropriate

A) glaciers receding from a landmass

B) an area decimated by a volcano

C) a newly formed island

D) when N < K

E) All except D

12. Explain the influence of population density on the growth rate in logistic growth.

13. Some carrying capacity independent factors include:

A) competition for food

B) predation

C) disease

D) competition for space

E) extreme temperature

14. Which of the following is a source of disturbance or an effect of disturbance?

A) arrival of new predators

B) severe weather

C) humans destroying forests

D) disturbance can cause diversity

E) all of the above