chapter 24 section 1 Flashcards Preview

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Flashcards in chapter 24 section 1 Deck (22):
1

what are extreme halophiles

salt loving bacteria

2

what are thermoacidophiles

live in extremely acidic environments

3

what is bacilus

eubcateria that is rod shaped

4

what is a coccus

eubacteria that is sphere shpaed

5

what is a spirillum

eubacteria that is spiral shaped

6

what is streptococcus

when cocci occur in chains

7

what is staphylococcus

when cocci occur in cluster

8

fossil evidence indicates that the earliest bacteria on earth lived about ______________ before eukaryotes

1 billion years

9

what is a type of bacteria you would be most likely to find in very salty water

extreme halophile

10

archaebacteria and eubacteria are placed in separate kingdoms because archabacteria have some ________

genes that closely resemble those found in eukaryotes

11

actinomycetes are ___________ bacteria that ______________

gram positive bacteria
form branching filaments

12

a type of bacteria you would find in the human intestinal tract

enteric bacterium

13

gram positive bacteria are

bacteria that retain the gram stain and appear purple under the microscope

14

gram negative bacteria are

bacteria that do not retain the purple stain and appears pink

15

Gram positive bacteria retain the gram stain because

they have a thicker layer of peptidoglycon in their cell wall than gram negative bacteria

16

what are some characteristics that are predicted whether a bacterium retains the gram stain or not

different susceptibilities to antibacterial drugs, produce different toxic material, react differently to disinfectants.

17

two ecologically important characteristics of cyanobacteria

produces much of the earths oxygen
species fix atomospheric nitrogen

18

beneficial role of gram positive bacteria in the oral cavity

retards the growth of disease causing bacteria in the oral cavity

19

one harmful role of gram positive bacteria in the oral cavity

tooth decay

20

the sudden increase in the number of cyanobacteria due to a high availability of nutrients is

eutrophication or population bloom

21

gram negative spiral shaped heterotrophic bacteria

spirochetes

22

gram negative bacteria that can extract energy from minerals by oxidizing the chemicals in these minerals.

chemoautotrophs