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​The first eukaryotic cells were ____.


A) ​bacteria
B) ​archaea
C) ​protists
D) ​algae
E) ​fungi

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Following infection of a white blood cells by the human immunodeficiency virus (HIV) , viral reverse transcriptase produces a ____ copy of its RNA genome.


A) single-stranded DNA
B) double-stranded DNA
C) single-stranded RNA
D) double-stranded RNA
E) backward DNA

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Matching Match the following terms with the description to which they best correspond. -​thrives in high salt conditions A)protist B)prokaryote C)photoautotroph D)pathogen E)protocell F)halophile G)strain

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​Foraminifera are predatory protists with a ____ shell, which is the ultimate source of _____.


A) ​silicon; oxygen
B) ​carbon; carbon dioxide
C) ​chitin; ozone
D) ​bicarbonate; chalk and limestone
E) ​calcium carbonate; chalk and limestone

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Match the following bacterial diseases with the proper description. -sore throat and can damage heart A)whooping cough B)strep throat C)cholera D)gonorrhea

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​____ are dome-shaped structures composed of layers of early cells and sediments.


A) ​Meteorites
B) ​Protocells
C) ​Stromatolites
D) ​Hydrothermal fossils
E) ​Protofossils

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​A coccus is a(n) ____.


A) ​rod-shaped bacterium
B) ​spherical bacterium
C) ​multicellular bacterial colony
D) ​spiral-shaped bacterium
E) ​bacteriophage

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​Plasmodium is a(n) ____.


A) ​apicomplexan
B) ​diatom
C) ​ciliate
D) ​dinoflagellate
E) ​flagellated protozoan

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Match the following terms with the description to which they best correspond. -​genetically distinct subtype of a particular microorganism A)protist B)prokaryote C)photoautotroph D)pathogen E)protocell F)halophile G)strain

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Protists that are part of a(n) _____ are integrated with other cells but remain self-sufficient.


A) multicellular organism
B) colonial organism
C) contractile vacuole
D) algal bloom
E) pathogenic life cycle

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​____ are believed to have once existed as independent prokaryotes.


A) ​Bacteriophages
B) ​Chloroplasts
C) ​Slime molds
D) ​Protists
E) ​Nuclei

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Matching HAS VARIABLES: False LEARNING OBJECTIVES: BTAT.STAR.21.14.04.01 - List some structural and functional traits shared by bacteria and archaea.DATE CREATED: 11/18/2019 3:02 PM DATE MODIFIED: 12/16/2019 4:57 AM -​cell wall

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​____ obtain both energy and carbon from organic compounds.


A) ​Photoautotrophs
B) ​Chemoautotrophs
C) ​Photoheterotrophs
D) ​Chemoheterotrophs
E) ​Decomposers

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​Agar is produced by ____.


A) ​brown algae
B) ​red algae
C) ​phycobilins
D) ​brown and red algae
E) ​red algae and phycobilins

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​​Scientists hypothesize that ____ served as a primitive template for forming polymer chains from organic subunits, such as amino acids.


A) ​meteorites that landed in the oceans
B) ​clay particles in tidal flats
C) ​sulfur that precipitated out of hydrothermal vents
D) ​rusty rocks
E) ​magma spewed from early volcanic activity

Correct Answer

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