Bio 200 Test 1 – Poulin Exam
Questions with Correct Answers
What did the Paleozoic era end with? - ANSWER-The permian, 96% of all life forms
go extinct, 70% terrestrial vertebrates go extinct, only known mass extinction of
insects
The Cambrian explosions - ANSWER-the rapid appearance of most major animal
phyla, probably not such a big bang
The Mesozoic Era - ANSWER-Age of reptiles, 250-65 mya, mammals first seen
200M years ago
What did the Mesozoic Era end with? - ANSWER-It ended with the K-T extinction
K-T boundary - ANSWER-layer of iridium-rich material between rocks of the
Cretaceous period and rocks of the Paleogene period that provides evidence of a
meteorite impact
The cenozoic era - ANSWER-Age of mammals, 65 MYA to now, appearance of first
humans
Geologic clocks - ANSWER-Helps us visualize the passage of time, the formation of
earth like a 12 hour clock
Panspermia - ANSWER-a theory that life did not originate on Earth but arrived in the
form of bacterial spores or viruses from an extraterrestrial source
What is life? - ANSWER-It has two characteristics: organized & replicates itself.
What was earth like 3.8 bya? - ANSWER-it was molten rock, no free oxygen, high
energy environment
What was the first step to forming life? - ANSWER-Abiotic synthesis of organic
materials (organic chemical compounds):
Miller-Urey Experiment - ANSWER-Two scientists attempted to reproduce the
condition of the (assumed) earth's primitive ocean's under a reducing atmosphere.
They produced some of the key molecules to life (amino acids and nucleotides) ,
within a week: amino acids, nucleotides, sugars, lipids, ATP
What is step two to forming life? - ANSWER-Formation of Polymers: amino acids
have to become proteins, they need to become chains, they think clay may have
formed chains bc of positive charge
, What is step three to forming life? - ANSWER-Formation of protobionts: made out of
hydrophilic lipid head, hydrophobic tails, they can form a lipid bilayer, or lipizome
What is part four to forming life? - ANSWER-Origin of hereditary material: the first life
probably existed in a RNA
Why was the first life in an RNA world? (1) - ANSWER-Easily forms abiotically
Why was the first life in an RNA world? (2) - ANSWER-Can replicate itself
Why was the first life in an RNA world? (3) - ANSWER-Has hereditary information
Why was the first life in an RNA world? (4) - ANSWER-Has catalytic properties
What are clues to the RNA world? - ANSWER-Viroids
How do things become living? - ANSWER-We have no idea
Morganucodon watsoni - ANSWER-inch long mammal who shared characteristics
similar to those of a weasel.meozoic era
Divine Creation - ANSWER-a supreme being created the earth, organisms function
the way the divine creator wants them to, species do not change
Anaximander - ANSWER-He believed all organisms came from common ancestors
or they had common descent, he also believed in transmission of species
transmutation of species - ANSWER-view that species can change and give rise to
new species
common descent - ANSWER-principle that all living things have a common ancestor
Carolus Linnaeus (1707-1778) - ANSWER-He proposed a classification scheme for
life on Earth
bionomial nomenclature - ANSWER-a system to specify an organism by its genus
and species. every organism is given a scientific name consisting of two parts: its
genus and species names
Nested hierarchy of organisms - ANSWER-Kingdom, Phylum, Class, Order, Family,
Genus, Species
Sedimentation - ANSWER-Sediments deposited by water were compressed to form
stone
James Hutton (1726-1797) - ANSWER-Father of Modern Geology, naturalist,
examined rocks
Erosion - ANSWER-Rock exposed to the elements breaks down into sediments
Questions with Correct Answers
What did the Paleozoic era end with? - ANSWER-The permian, 96% of all life forms
go extinct, 70% terrestrial vertebrates go extinct, only known mass extinction of
insects
The Cambrian explosions - ANSWER-the rapid appearance of most major animal
phyla, probably not such a big bang
The Mesozoic Era - ANSWER-Age of reptiles, 250-65 mya, mammals first seen
200M years ago
What did the Mesozoic Era end with? - ANSWER-It ended with the K-T extinction
K-T boundary - ANSWER-layer of iridium-rich material between rocks of the
Cretaceous period and rocks of the Paleogene period that provides evidence of a
meteorite impact
The cenozoic era - ANSWER-Age of mammals, 65 MYA to now, appearance of first
humans
Geologic clocks - ANSWER-Helps us visualize the passage of time, the formation of
earth like a 12 hour clock
Panspermia - ANSWER-a theory that life did not originate on Earth but arrived in the
form of bacterial spores or viruses from an extraterrestrial source
What is life? - ANSWER-It has two characteristics: organized & replicates itself.
What was earth like 3.8 bya? - ANSWER-it was molten rock, no free oxygen, high
energy environment
What was the first step to forming life? - ANSWER-Abiotic synthesis of organic
materials (organic chemical compounds):
Miller-Urey Experiment - ANSWER-Two scientists attempted to reproduce the
condition of the (assumed) earth's primitive ocean's under a reducing atmosphere.
They produced some of the key molecules to life (amino acids and nucleotides) ,
within a week: amino acids, nucleotides, sugars, lipids, ATP
What is step two to forming life? - ANSWER-Formation of Polymers: amino acids
have to become proteins, they need to become chains, they think clay may have
formed chains bc of positive charge
, What is step three to forming life? - ANSWER-Formation of protobionts: made out of
hydrophilic lipid head, hydrophobic tails, they can form a lipid bilayer, or lipizome
What is part four to forming life? - ANSWER-Origin of hereditary material: the first life
probably existed in a RNA
Why was the first life in an RNA world? (1) - ANSWER-Easily forms abiotically
Why was the first life in an RNA world? (2) - ANSWER-Can replicate itself
Why was the first life in an RNA world? (3) - ANSWER-Has hereditary information
Why was the first life in an RNA world? (4) - ANSWER-Has catalytic properties
What are clues to the RNA world? - ANSWER-Viroids
How do things become living? - ANSWER-We have no idea
Morganucodon watsoni - ANSWER-inch long mammal who shared characteristics
similar to those of a weasel.meozoic era
Divine Creation - ANSWER-a supreme being created the earth, organisms function
the way the divine creator wants them to, species do not change
Anaximander - ANSWER-He believed all organisms came from common ancestors
or they had common descent, he also believed in transmission of species
transmutation of species - ANSWER-view that species can change and give rise to
new species
common descent - ANSWER-principle that all living things have a common ancestor
Carolus Linnaeus (1707-1778) - ANSWER-He proposed a classification scheme for
life on Earth
bionomial nomenclature - ANSWER-a system to specify an organism by its genus
and species. every organism is given a scientific name consisting of two parts: its
genus and species names
Nested hierarchy of organisms - ANSWER-Kingdom, Phylum, Class, Order, Family,
Genus, Species
Sedimentation - ANSWER-Sediments deposited by water were compressed to form
stone
James Hutton (1726-1797) - ANSWER-Father of Modern Geology, naturalist,
examined rocks
Erosion - ANSWER-Rock exposed to the elements breaks down into sediments
