Biodiversity Lesson 4: Domain bacteria and Domain Archaea

Question 1

what is included in domain bacteria and what are their characteristic’s?

Answer 1

-large and diverse group of organisms that consist of prokyratic
characteristics:
1. have no nucleus
2. cell walls contain protien peptudoglycan
3. grow everywhere on earth

Question 2

what are the types of bacteria? how do we classify them?

(3 types)

Answer 2

-classify them by their shape

Types
1. cocci–>round
2. bacilli–>rod-shaped
3. spirilla –>spiral-shaped

Question 3

what are the prefix’s of the characteristics in Bacteria growth?

Answer 3

1. diplo–>arranged in pairs
2. staphylo–>arranged in clusters
3. strepto–>cells arranged in a chain

Question 4

what are the types of bacterial respiration?

(4 types)

Answer 4

1. obligate aerobes
2. microaerophile
3. obligate anaerobes
4. facultative anaerobes

Question 5

what are obligate aerobes

Answer 5

need constant o2 supply

Question 6

what are microaerophiles

Answer 6

need very low o2 conc. <21%

Question 7

what are obligate anaerobes

Answer 7

must live in absence of o2

Question 8

what are facultative anaerobes

Answer 8

they use fermentation of organic molecules for energy like obligate anaerobes do but are not harmed by oxygen

Question 9

what are the two ways Bactria can produce energy

Answer 9

• autotrophs
• heterotrophs

Question 10

what are included in the autotroph category

Answer 10

• phototrophic autotrophs
• chemotrophic autotrophs

Question 11

what are included in the heterotrophic category

Answer 11

• chemotrophic heterotrophic
• photosynthetic heterotrophic

Question 12

what do phototrophic autotrophs do?

Answer 12

use light energy to create carbohydrates

Question 13

what do chemotrophic autotrophs do?

Answer 13

use inorganic chemicals such as hydrogen sulfide, nitrites , ammonia, sulfur and iron as energy

Question 14

what do chemotrophic heterotrophs do?

Answer 14

break down organic molecules for energy

Question 15

what do photosynthetic heterotrophs do?

Answer 15

can obtain energy wither through photosynthesis or break down of organic molecules

Question 16

what are the importance of bacteria in society

(3 with examples)

Answer 16

1. food production
   -cheese,yogurt,buttermilk,sour cream
2. industry
   -petroleum,digestion,wasteand posoin removal,minning minerals and drug synthesis
3. human symbiosis
   -intestinal bacteria to digest cellulose or produce vitamins (K)