chapter 11

Question 1

Why is our knowledge of microbial diversity so limited?

Answer 1

small, hard to culture, need special nutrients, and part of complex food chains requiring products of other bacteria

Question 2

Dichotomous key(DK) for prokaryotes step 1 first split

Answer 2

Prokayotic ->

1. Peptidoglycan rRNA signiture
2. Pseudomurein rRNA signiture

Question 3

DK- Pseudomurein rRNA signiture leads to

Answer 3

Domain Archaea (end of line on DK)

Question 4

DK- Peptidoglycan rRNA signiture leads to

Answer 4

Domain Bacteria (splits for next step)

Question 5

DK- Domain Bacteria (second split)

Answer 5

1. Gram-negative

2. Gram-positive

Question 6

DK Gram-negative split

Answer 6

1. Proteobacteria

2. Nonproteobacteria

Question 7

DK Gram-positive split

Answer 7

1. Low G+C

2. High G+C

Question 8

extremeophiles

Answer 8

Domain Archaea

-hyperthermophiles, methanogens, and extreme halophiles