Site MapHelpFeedbackPost-Test
Post-Test
(See related pages)

1
The earliest known fossilized species most closely resembles which one of the following modern species?
A)Ferns
B)Apes
C)Humans
D)Cyanobacteria
E)Yeast
2
The first living cells are believed to have evolved on Earth approximately _________ years ago; the first multicellular eukaryotes are believed to have evolved approximately ________________ years ago.
A)1.5 billion; 500 million
B)2.0 billion; 1.0 billion
C)600 million; 300 million
D)100 million; 50 million
E)3.5 billion; 1.5 billion
3
Which one of the following compounds is believed to have been the least prevalent in the conditions of primitive Earth?
A)O2
B)H2O
C)CO2
D)N2
E)NH3
4
Which of the following is a proposed hypothesis for the origin of organic molecules on Earth?
A)Early atmospheric components provided a reducing environment leading to formation of complex organic molecules from simple inorganic molecules.
B)Temperature gradients between superheated deep sea vents and the surrounding cold water were suitable for the formation of complex biological molecules.
C)Organic molecules arrived on Earth from meteorites.
D)Early atmospheric components provided a reducing environment leading to formation of complex organic molecules from simple inorganic molecules and temperature gradients between superheated deep sea vents and the surrounding cold water were suitable for the formation of complex biological molecules
E)Early atmospheric components provided a reducing environment leading to formation of complex organic molecules from simple inorganic molecules and temperature gradients between superheated deep sea vents and the surrounding cold water were suitable for the formation of complex biological moleculesand organic molecules arrived on Earth from meteorites E
5
Which one of the following is characteristics of protobionts is incorrect?
A)They were capable of self-replication
B)They synthesized an energy source similar to ATP
C)A membrane separated them from their surroundings
D)Polymers inside them had enzymatic capabilities
E)Polymers inside them carried information
6
Which of the following is a key characteristic of RNA that leads scientists to believe that it may have been the first macromolecule?
A)RNA has self-replicating ability due to its base pairing of nucleotides
B)RNA can have enzymatic function in the form of ribozymes
C)RNA can store information in the form of its nucleotide sequence
D)None of the characteristics of RNA support RNA as the first macromolecule
E)All of the statements support RNA as the first macromolecule.
7
True or False: Chemical selection has been proposed as the process by which RNA was able to evolve into more complex macromolecules.
A)True
B)False
8
Which of the following would not have occurred during chemical selection in protobiotic RNA?
A)A mutation leading to ribonucleotide synthesis
B)A mutation leading to enzyme assisted self replication
C)A greater rate of growth of protobionts with a ribonucleotide synthesis mutation
D)A greater rate of growth of protobionts with enzyme assisted self replication
E)All of the choices would have occurred during chemical selection in protobiotic RNA.
9
The Bartel Szotsak experiment was conducted in order to .
A)select for RNA molecules with self replicating ability.
B)select for RNA with the ability to catalyze covalent bonds with other RNA molecules.
C)select for RNA that could utilize reverse transcriptase to synthesize DNA.
D)select for short RNA molecules capable of base pairing with complementary sequences on long RNA molecules.
E)support the theory of chemical selection through the synthesis of RNA molecules with enzymatic activity for covalent bonding between nucleotide bases.
10
True or False: The first three eras of the geological time scale are collectively referred to as the Precambrian.
A)True
B)False
11
Which of the following is not a factor that has influenced mass extinctions on Earth?
A)Meteorite impacts
B)Flooding
C)Climate changes
D)Glaciation
E)Human population on earth
12
Which of the following continents is believed to have existed during the Paleozoic period?
A)Laurasia
B)Rodinia
C)Pangaea
D)Africa
E)Gondwanaland
13
Which one of the following statements about the fossil record is correct?
A)14 C can be used to date fossils produced over 50,000 years ago.
B)The fossil record is an indisputable story of the "history of life."
C)The half-life of a radioisotope used in studying the fossil record is the time it takes for exactly one-half of the original isotope to decay.
D)The fossil record can accurately date the appearance of a species on the planet.
E)None of the statements about the fossil record are correct.
14
During the Archaean Eon, all life was believed to be _______________, and all metabolism was most likely ___________.
A)prokaryotic; aerobic
B)eukaryotic; heterotrophic
C)eukaryotic; aerobic
D)prokaryotic; anaerobic
E)eukaryotic; anaerobic
15
True or False: Scientists believe that the first living cells were heterotrophs, an hypothesis backed up by the fossil record.
A)True
B)False
16
True or False: Cyanobacteria promote the formation of stromatolites due to their pattern of growth.
A)True
B)False
17
Which of the following is a proposed mechanism for the development of multicellular organisms?
A)An unrelated species facilitates the assembly of cells into a multicellular organism
B)A single cell divides and the resulting daughter cells stick together
C)Several individual cells find each other and aggregate to form a colony
D)An unrelated species facilitates the assembly of cells into a multicellular organism and several individual cells find each other and aggregate to form a colony
E)An unrelated species facilitates the assembly of cells into a multicellular organism, a single cell divides and the resulting daughter cells stick together, and several individual cells find each other and aggregate to form a colony
18
An abrupt increase in the diversity of animal species occurred during the
A)Mesozoic era.
B)Jurassic period.
C)Devonian period.
D)Cenozoic era.
E)Cambrian period.
19
Which of the following statements about the Carboniferous period is incorrect?
A)It was during this period that swamps and forests covered most land masses.
B)The earth's temperature was cool
C)Large plants and trees developed
D)Terrestrial vertebrates emerged
E)Flying insects emerged
20
True or False: Hominids are believed to have come into existence during the Tertiary period.
A)True
B)False





To learn more about the book this website supports, please visit its Information Center.
(c)2011 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Notice.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.


Biology (Connect Demo CompanioOnline Learning Center

Home > Chapter 22 > Post-Test