Week 1 - BIOS 242
Week 1 - BIOS 242 – UPDATED Questions with 100% Verified
Answers
Chamberlain University-Illinois
BIOS 242
Week 1 - BIOS 242
Q1 Antoni van Leeuwenhoek
A father of microbiology
Q2 bacteria, archaea, fungi, protozoa, algae, and small multicellular animals
A Leeuwenhoek's microorganism classifications
Q3 bacteria and archaea
A unicellular and lack nuclei, much smaller than eukaryotes, found everywhere there is
sufficient moisture, reproduce asexually
Q4 bacteria
A peptidoglycan
Q5 fungi
A eukaryotic (have membrane-bound nucleus), obtain food from other organisms, and possess
cell walls
Q6 two categories of fungi
A molds and yeasts
Q7 molds
A multicellular; grow a long filaments; reproduce by sexual and asexual spores
Q8 yeasts
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,Week 1 - BIOS 242
A unicellular; reproduce asexually by budding; some produce sexual spores
Q9 protozoa
A single celled eukaryotes, similar to animals in nutrient needs and cellular structures, live
freely in water, asexual, most are capable of locomotion
Q10 pseudopods
A cell extensions that flow in direction of travel
Q11 cilia
A numerous short protrusions that propel organisms through its environment
Q12 flagella
A extensions of a cell that are fewer, longer, and more whiplike than cilia
Q13 algae
A can be unicellular or multicellular, photosynthetic, simple reproductive structures, and
categorized based on pigmentation and composition of cell wall
Q14 Aristotle
A who first proposed spontaneous generation
Q15 spontaneous generation
A living things can arise from nonliving matter
Q16 Redi's experiments
A -When decaying meat was kept isolated from flies, maggots never developed -Meat exposed
to flies was soon infested -As a result, scientists began to doubt Aristotle's theory
Q17 Needham's experiments
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, Week 1 - BIOS 242
A -Scientists agreed that large animals could not arise spontaneously, but believed microbes
could. -Needham's experiments with beef gravy and infusions of plant material reinforced
this idea
Q18 Figured the microbes needed food to eat in order to grow
A Why did Needham use plant material?
Q19 Spallanzani's Experiments
A -Contradicted Needham -Concluded that: Needham failed to heat vials sufficiently enough to
kill all microbes, microbes can exist in air (thus contaminating) -Did not believe in
spontaneous generation
Q20 Boiled the meat that way if there was any microorganisms they would be killed with the heat
A Why did Needham use gravy?
Q21 Pasteur's experiments
A -Performed experiments with "swan-necked" flasks -When the flasks remained upright, no
microbial growth appeared -When the flask was tilted, dust from the bend in the neck
seeped back in to the flask and made the infusion cloudy with microbes
Q22 juice in flask is inoculated with bacteria and sealed
A bacteria reproduce and acids are produced (bacteria ferment grape juice into acids)
Q23 juice in flask is inoculated with yeast and sealed
A yeast reproduce and alcohol is produced (yeast ferments grape juice into alcohol)
Q24 Pasteurization
A process of heating liquids just enough to kill most bacteria, but still need to refrigerate so
other bacteria does not grow
Q25 Buchner's experiments
Page 3
Week 1 - BIOS 242 – UPDATED Questions with 100% Verified
Answers
Chamberlain University-Illinois
BIOS 242
Week 1 - BIOS 242
Q1 Antoni van Leeuwenhoek
A father of microbiology
Q2 bacteria, archaea, fungi, protozoa, algae, and small multicellular animals
A Leeuwenhoek's microorganism classifications
Q3 bacteria and archaea
A unicellular and lack nuclei, much smaller than eukaryotes, found everywhere there is
sufficient moisture, reproduce asexually
Q4 bacteria
A peptidoglycan
Q5 fungi
A eukaryotic (have membrane-bound nucleus), obtain food from other organisms, and possess
cell walls
Q6 two categories of fungi
A molds and yeasts
Q7 molds
A multicellular; grow a long filaments; reproduce by sexual and asexual spores
Q8 yeasts
Page 1
,Week 1 - BIOS 242
A unicellular; reproduce asexually by budding; some produce sexual spores
Q9 protozoa
A single celled eukaryotes, similar to animals in nutrient needs and cellular structures, live
freely in water, asexual, most are capable of locomotion
Q10 pseudopods
A cell extensions that flow in direction of travel
Q11 cilia
A numerous short protrusions that propel organisms through its environment
Q12 flagella
A extensions of a cell that are fewer, longer, and more whiplike than cilia
Q13 algae
A can be unicellular or multicellular, photosynthetic, simple reproductive structures, and
categorized based on pigmentation and composition of cell wall
Q14 Aristotle
A who first proposed spontaneous generation
Q15 spontaneous generation
A living things can arise from nonliving matter
Q16 Redi's experiments
A -When decaying meat was kept isolated from flies, maggots never developed -Meat exposed
to flies was soon infested -As a result, scientists began to doubt Aristotle's theory
Q17 Needham's experiments
Page 2
, Week 1 - BIOS 242
A -Scientists agreed that large animals could not arise spontaneously, but believed microbes
could. -Needham's experiments with beef gravy and infusions of plant material reinforced
this idea
Q18 Figured the microbes needed food to eat in order to grow
A Why did Needham use plant material?
Q19 Spallanzani's Experiments
A -Contradicted Needham -Concluded that: Needham failed to heat vials sufficiently enough to
kill all microbes, microbes can exist in air (thus contaminating) -Did not believe in
spontaneous generation
Q20 Boiled the meat that way if there was any microorganisms they would be killed with the heat
A Why did Needham use gravy?
Q21 Pasteur's experiments
A -Performed experiments with "swan-necked" flasks -When the flasks remained upright, no
microbial growth appeared -When the flask was tilted, dust from the bend in the neck
seeped back in to the flask and made the infusion cloudy with microbes
Q22 juice in flask is inoculated with bacteria and sealed
A bacteria reproduce and acids are produced (bacteria ferment grape juice into acids)
Q23 juice in flask is inoculated with yeast and sealed
A yeast reproduce and alcohol is produced (yeast ferments grape juice into alcohol)
Q24 Pasteurization
A process of heating liquids just enough to kill most bacteria, but still need to refrigerate so
other bacteria does not grow
Q25 Buchner's experiments
Page 3
