Biology Exam 4 comprehensive
Questions and Answers with Verified
Solutions
Question 1:
Describe the diversity abundance and importance of prokaryotic life
Answer:
Prokaryotes are the most abundant organisms on Earth occupy nearly
every habitat recycle nutrients support ecosystems and influence human
health.
Question 2:
Compare prokaryotic shapes
Answer:
Prokaryotes may be cocci spherical bacilli rod-shaped or
spirilla/spirochetes spiral-shaped.
Question 3:
Compare prokaryotic cell walls
Answer:
Bacterial cell walls contain peptidoglycan while archaeal cell walls do not.
Question 4:
Compare prokaryotic projections
Answer:
Common projections include flagella for movement and fimbriae for
attachment.
,Question 5:
Anton van Leeuwenhoek contribution
Answer:
First scientist to observe and describe living microorganisms with a
microscope.
Question 6:
How bacteria evolve quickly
Answer:
Bacteria reproduce rapidly mutate frequently and exchange genes
through horizontal gene transfer.
Question 7:
How bacteria survive stressful environments
Answer:
Bacteria may form endospores enter dormancy or possess protective
adaptations.
Question 8:
Nutritional diversity of prokaryotes
Answer:
Includes photoautotrophs chemoautotrophs photoheterotrophs and
chemoheterotrophs.
Question 9:
Photoautotroph
Answer:
Organism that uses light as an energy source and CO2 as a carbon
source.
, Question 10:
Chemoautotroph
Answer:
Organism that obtains energy and carbon from inorganic chemicals.
Question 11:
Photoheterotroph
Answer:
Organism that uses light for energy but obtains carbon from organic
compounds.
Question 12:
Chemoheterotroph
Answer:
Organism that obtains both energy and carbon from organic compounds.
Question 13:
Why biofilms are unique
Answer:
Biofilms are organized microbial communities attached to surfaces.
Question 14:
Why biofilms can be dangerous
Answer:
Biofilms can resist antibiotics immune defenses and disinfectants.
Questions and Answers with Verified
Solutions
Question 1:
Describe the diversity abundance and importance of prokaryotic life
Answer:
Prokaryotes are the most abundant organisms on Earth occupy nearly
every habitat recycle nutrients support ecosystems and influence human
health.
Question 2:
Compare prokaryotic shapes
Answer:
Prokaryotes may be cocci spherical bacilli rod-shaped or
spirilla/spirochetes spiral-shaped.
Question 3:
Compare prokaryotic cell walls
Answer:
Bacterial cell walls contain peptidoglycan while archaeal cell walls do not.
Question 4:
Compare prokaryotic projections
Answer:
Common projections include flagella for movement and fimbriae for
attachment.
,Question 5:
Anton van Leeuwenhoek contribution
Answer:
First scientist to observe and describe living microorganisms with a
microscope.
Question 6:
How bacteria evolve quickly
Answer:
Bacteria reproduce rapidly mutate frequently and exchange genes
through horizontal gene transfer.
Question 7:
How bacteria survive stressful environments
Answer:
Bacteria may form endospores enter dormancy or possess protective
adaptations.
Question 8:
Nutritional diversity of prokaryotes
Answer:
Includes photoautotrophs chemoautotrophs photoheterotrophs and
chemoheterotrophs.
Question 9:
Photoautotroph
Answer:
Organism that uses light as an energy source and CO2 as a carbon
source.
, Question 10:
Chemoautotroph
Answer:
Organism that obtains energy and carbon from inorganic chemicals.
Question 11:
Photoheterotroph
Answer:
Organism that uses light for energy but obtains carbon from organic
compounds.
Question 12:
Chemoheterotroph
Answer:
Organism that obtains both energy and carbon from organic compounds.
Question 13:
Why biofilms are unique
Answer:
Biofilms are organized microbial communities attached to surfaces.
Question 14:
Why biofilms can be dangerous
Answer:
Biofilms can resist antibiotics immune defenses and disinfectants.
