bacteria

Question 1

what is bacteria

Answer 1

-smallest and simplest living forms
-monera
-prokaryotic (no true nucleus)
-some are pathogenic (cholera; tb)

Question 2

what two places do bacteria live

Answer 2

-aerobic: presence of oxygen
-anaerobic: absence of oxygen

Question 3

what’s the basic structure of bacteria

Answer 3

-unicellular
-bacterium cell is surrounded by a cell wall that consists of polysaccharides, proteins and lipids
-some bacteria have flagella and may be surrounded by a slimy capsule (protection)
-ribosomes
-dna in the nucleoid
-flagella moves liquid

Question 4

what are the four types of bacteria

Answer 4

-bacilli (rod shaped)
-cocci (round)
-spirilla (spirillum)
-vibrio (comma shaped)

Question 5

some bacteria are ______ and produce their own organic substances by ___________ or by __________

Answer 5

-autotrophic
-photosynthesis
-chemosynthesis

Question 6

what is chemosynthesis

Answer 6

-energy obtained from chemical processes

Question 7

what are the three types of heterotrophic bacteria

Answer 7

-parasitic: obtains food from living organisms
-saprophytic: obtains food from dead organisms
-mutualistic: obtains food from a symbiotic relationship with another organism (both benefit)

Question 8

how does reproduction occur

Answer 8

occurs asexually by binary fission: where a single cell divides into two cells with identical DNA