Biology 109: Chapter 27 Bacteria and
Archaea 2024/2025 Exam Questions and
Answers | 100% Pass
Positive phototaxis - 🧠ANSWER ✔✔Bodily movement of a motile organism
in response toward a light
Negative phototaxis - 🧠ANSWER ✔✔Bodily movement of a motile
organism in response away from a light
Endospore - 🧠ANSWER ✔✔A thick-coated, resistant cell produced by
some bacterial cells when they are exposed to hard conditions
Binary fission - 🧠ANSWER ✔✔A method of asexual reproduction in single-
celled organisms in which the cell grows to roughly double its size and then
divides into two cells
In prokaryotes - Binary fission doesn't involve mitosis
In eukaryotes - It involves mitosis as it undergoes binary fission
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STATEMENT. ALL RIGHTS RESERVED
, Phototroph - 🧠ANSWER ✔✔Organisms that obtain energy from light
Chemotroph - 🧠ANSWER ✔✔Organisms that obtain energy from
chemicals
Autotroph - 🧠ANSWER ✔✔An organism that obtains organic food
molecules without eating other organisms or substances derived from other
organisms. Autotrophs use energy from the sun or from oxidation of
inorganic substances to make organic molecules from inorganic ones
Heterotroph - 🧠ANSWER ✔✔An organism that obtains organic food
molecules by eating other organisms or substances derived from them
Obligate aerobe - 🧠ANSWER ✔✔An organism that requires oxygen for
cellular respiration and cannot live without it
Facultative anaerobe - 🧠ANSWER ✔✔An organism that makes ATP by
aerobic respiration if oxygen is present but that switches to anaerobic
respiration or fermentation if oxygen is not present
Obligate anaerobe - 🧠ANSWER ✔✔An organism that carries out only
fermentation or anaerobic respiration. Such organisms can't use oxygen
and may be poisoned by it
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
Archaea 2024/2025 Exam Questions and
Answers | 100% Pass
Positive phototaxis - 🧠ANSWER ✔✔Bodily movement of a motile organism
in response toward a light
Negative phototaxis - 🧠ANSWER ✔✔Bodily movement of a motile
organism in response away from a light
Endospore - 🧠ANSWER ✔✔A thick-coated, resistant cell produced by
some bacterial cells when they are exposed to hard conditions
Binary fission - 🧠ANSWER ✔✔A method of asexual reproduction in single-
celled organisms in which the cell grows to roughly double its size and then
divides into two cells
In prokaryotes - Binary fission doesn't involve mitosis
In eukaryotes - It involves mitosis as it undergoes binary fission
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
, Phototroph - 🧠ANSWER ✔✔Organisms that obtain energy from light
Chemotroph - 🧠ANSWER ✔✔Organisms that obtain energy from
chemicals
Autotroph - 🧠ANSWER ✔✔An organism that obtains organic food
molecules without eating other organisms or substances derived from other
organisms. Autotrophs use energy from the sun or from oxidation of
inorganic substances to make organic molecules from inorganic ones
Heterotroph - 🧠ANSWER ✔✔An organism that obtains organic food
molecules by eating other organisms or substances derived from them
Obligate aerobe - 🧠ANSWER ✔✔An organism that requires oxygen for
cellular respiration and cannot live without it
Facultative anaerobe - 🧠ANSWER ✔✔An organism that makes ATP by
aerobic respiration if oxygen is present but that switches to anaerobic
respiration or fermentation if oxygen is not present
Obligate anaerobe - 🧠ANSWER ✔✔An organism that carries out only
fermentation or anaerobic respiration. Such organisms can't use oxygen
and may be poisoned by it
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
