11.  Which of the following is found in eukaryotic cells but not in prokaryotic cells?   
A.  nucleus
B.  mitochondria
C.  endoplasmic reticulum
D.  lysosomes
E.  All of the choices are correct.

12.  The endosymbiotic theory says that precursor eukaryotic cells acquired flagella by endosymbiosis with a _____ ancestor, and others gained photosynthetic ability from endosymbiosis with a _____ ancestor.  
A.  protozoan, algae
B.  archaea, cyanobacteria
C.  spirochete, cyanobacteria
D.  helminth, algae
E.  None of the choices are correct.

13.  The cell’s series of tunnel-like membranes functioning in transport and storage are the   
A.  mitochondria.
B.  lysosomes.
C.  Golgi apparatus.
D.  chloroplasts.
E.  endoplasmic reticulum.

14.  An organelle that is a stack of flattened, membranous sacs and functions to receive, modify, and package proteins for cell secretion is the  
A.  mitochondria.
B.  lysosomes.
C.  Golgi apparatus.
D.  chloroplasts.
E.  endoplasmic reticulum.

15.  Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?   
A.  mitochondria
B.  lysosomes
C.  Golgi apparatus
D.  chloroplasts
E.  endoplasmic reticulum

16.  Organelles found in algae but not found in protozoa or fungi are the  
A.  mitochondria.
B.  lysosomes.
C.  Golgi apparatus.
D.  chloroplasts.
E.  endoplasmic reticulum.

17.  Protists with contractile vacuoles  
A.  are algae.
B.  use them to expel excess water from the cell.
C.  typically live in salty seawater.
D.  use them for motility.
E.  All of the choices are correct.

18.  The cytoskeleton   
A.  anchors organelles.
B.  provides support.
C.  functions in movements of the cytoplasm.
D.  helps maintain cell shape.
E.  All of the choices are correct.

19.  The size of a eukaryotic cell ribosome is  
A.  30S.
B.  40S.
C.  50S.
D.  70S.
E.  80S.

20.  Filamentous fungi are called  
A.  pseudohyphae.
B.  septa.
C.  molds.
D.  dimorphic.
E.  mycelium.