bacteria

Question 1

characteristics

Answer 1

unicellular, prokaryotic, single chromosome, asexual repoduction by binary fission, grow in moist environments, divided into 2 domains: archaea and bacteria

Question 2

bacteria shapes

Answer 2

1. cocci (singular coccus): round or spherical
2. bacilli (singular bacillus): rod shaped
3. spirilla (singular spirillum): spiral shape

Question 3

aggregations

Answer 3

1. mono=single
2. diplo=two
3. staphylo= clumped
4. strepto=chain

Question 4

reproduction

asexual reproduction by binary fission

Answer 4

1. chromosome duplication
2. cell growth
3. chromosomes separate
4. cell builds a septum
5. cell division

Question 5

reproduction

sexual reproduction by conjugation

Answer 5

1. one cell links to another through a pilus
2. genetic info is exchanged
3. binary fission

Question 6

reproduction

plasmids

Answer 6

small loops of dna that are separate from the main chromosome with different genes

Question 7

gram staining

Answer 7

1. gram + = thick protein layer, purple stain
2. gram - = thin protein layer, pink stain

Question 9

archaea

Answer 9

• oldest group of living organisms
• live without oxygen

Question 10

archaea

extremophile

Answer 10

able to live in extreme conditions

thermophiles: withstand extreme heat
acidophile: live in extremely acidic conditions
halophiles: live in extremely salty water

Question 12

mesophiles

Answer 12

live in moderate conditions