BIOL 121 Exam 4 Latest 2025/2026
Questions and Correct Answers Graded
A+|Assured Success
Kingdom Protista, fungi, Animalia, plantae - CORRECT ANSWER-Eukaryotes are
Kingdom Protista - CORRECT ANSWER-historical grab back for unicellular
organisms that had one commonality; they werent animals, fungi, or true plants.
Ancestral photosynthetic eukaryotes - CORRECT ANSWER-a heterotrophic
eukaryotic cell which engulfed a photosynthetic prokaryote, which developed into
chloroplasts
,Evidence that Prokaryotes led to mitochondria and chloroplasts - CORRECT
ANSWER-they are all about the same size
Protist - CORRECT ANSWER-soft taxonomic term
Endosymbiotic theory of the origin of eukaryotic cells - CORRECT ANSWER-Cell
grew over evolutionary time,
infoldings of the cell membrane occurs which lead to complexity;
endoplasmic reticulum and nuclear membrane emerged
the cell engulfed an aerobic heterotrophic prokaryote (example of endosymbiont)
the cell and prokaryote became a single organism. The endosymbiont gave rise to
mitochondria
Either became heterotrophic or photosynthetic....
Endosymbiont - CORRECT ANSWER-cell lives within host cell, is mutually
beneficial
Ancestral heterotrophic eukaryotes - CORRECT ANSWER-cell with only
mitochondria (other organelles)
, they all contain their own ring of DNA
they replicate by fission
ribosomes are also about the same size (another prokaryote could have been
engulfed?)
Plastid - CORRECT ANSWER-A group of membrane‐bound organelles
commonly found in photosynthetic organisms and mainly responsible for the
synthesis and storage of food.
like chloroplasts, leucoplasts, or chromoplasts
chloroplast - CORRECT ANSWER-type of plastic that is the site of
photosynthesis
leucoplast - CORRECT ANSWER-type of plastid that stores starch
chromoplasts - CORRECT ANSWER-type of plastid that stores pigments that
are responsible for the bright colors in fruit and flowers
Membrane complexity - CORRECT ANSWER-plastids in different eukaryotes
have different membrane amounts (proof of engulfing happening)
1 membrane - CORRECT ANSWER-cyanobacteria (ancestral prokaryote)
Questions and Correct Answers Graded
A+|Assured Success
Kingdom Protista, fungi, Animalia, plantae - CORRECT ANSWER-Eukaryotes are
Kingdom Protista - CORRECT ANSWER-historical grab back for unicellular
organisms that had one commonality; they werent animals, fungi, or true plants.
Ancestral photosynthetic eukaryotes - CORRECT ANSWER-a heterotrophic
eukaryotic cell which engulfed a photosynthetic prokaryote, which developed into
chloroplasts
,Evidence that Prokaryotes led to mitochondria and chloroplasts - CORRECT
ANSWER-they are all about the same size
Protist - CORRECT ANSWER-soft taxonomic term
Endosymbiotic theory of the origin of eukaryotic cells - CORRECT ANSWER-Cell
grew over evolutionary time,
infoldings of the cell membrane occurs which lead to complexity;
endoplasmic reticulum and nuclear membrane emerged
the cell engulfed an aerobic heterotrophic prokaryote (example of endosymbiont)
the cell and prokaryote became a single organism. The endosymbiont gave rise to
mitochondria
Either became heterotrophic or photosynthetic....
Endosymbiont - CORRECT ANSWER-cell lives within host cell, is mutually
beneficial
Ancestral heterotrophic eukaryotes - CORRECT ANSWER-cell with only
mitochondria (other organelles)
, they all contain their own ring of DNA
they replicate by fission
ribosomes are also about the same size (another prokaryote could have been
engulfed?)
Plastid - CORRECT ANSWER-A group of membrane‐bound organelles
commonly found in photosynthetic organisms and mainly responsible for the
synthesis and storage of food.
like chloroplasts, leucoplasts, or chromoplasts
chloroplast - CORRECT ANSWER-type of plastic that is the site of
photosynthesis
leucoplast - CORRECT ANSWER-type of plastid that stores starch
chromoplasts - CORRECT ANSWER-type of plastid that stores pigments that
are responsible for the bright colors in fruit and flowers
Membrane complexity - CORRECT ANSWER-plastids in different eukaryotes
have different membrane amounts (proof of engulfing happening)
1 membrane - CORRECT ANSWER-cyanobacteria (ancestral prokaryote)
