Bio 200 Test 1 – Poulin CORRECT QUESTIONS & SOLUTIONS(RATED A
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Course
Bio 200
Institution
Bio 200
What does evolution mean? - ANSWER Change over time
conservation biology - ANSWER The integrated study of ecology, evolutionary biology, physiology, molecular biology, and genetics to sustain biological diversity at all levels
protoplanetary disk - ANSWER a large rotating cloud of dust, rocks...
Bio 200 Test 1 – Poulin CORRECT
QUESTIONS & SOLUTIONS(RATED A)
What does evolution mean? - ANSWER Change over time
conservation biology - ANSWER The integrated study of ecology, evolutionary biology, physiology,
molecular biology, and genetics to sustain biological diversity at all levels
protoplanetary disk - ANSWER a large rotating cloud of dust, rocks, and gas
what did the protoplanetary disk consist of? - ANSWER it was composed of hydrogen and helium, which
composed from the Big Bang
Nuclear fusion of hydrogen and helium led to what? - ANSWER The formation of the sun
what are time scales? - ANSWER the history of the planet
precambrian supereon - ANSWER 4.6 bya - 543 mya
paleozoic era - ANSWER 543 mya - 250 mya
meszoic era - ANSWER 250 mya - 65 mya
cenzoic era - ANSWER 65 mya - now
hadean eon (hell eon) - ANSWER oldest precambrian supereon, no ocean, no oxygen, earth was
bombarded by planetoids, which caused the planet to be fully molten
,late hadeon - ANSWER earth surface cools, but from bombardment we see cracks, these cracks released
steam and gases (volcanoes played a part too) , which formed an atmosphere, then clouds were formed,
which led to rain, which led to oceans
When did the hadean eon end? - ANSWER Between 4.3 and 3.8 bya
unicellular organism - ANSWER A single celled organism
Multicellular organisms - ANSWER Organism made up of many cells
Cyanobacterial mats / stromatolites - ANSWER Community consisting of photosynthetic cyanobacteria,
bacteria and diatoms that also fix nitrogen. They form layers/columns
Bacterial fossils is associated with? - ANSWER Cyanobacterial mats
Archean fossils - ANSWER both representatives of the major branches of the tree of life, the bacteria and
the archea
early multicellular organisms - ANSWER a billion years ago multicellular organisms arises, paleontologists
set the appearance of multicellular organism when they see hard shell life
The Paleozoic Era - ANSWER 543-250 mya, hard shell organisms, trilobites very common, arcaeocyathids,
sees first land plants and animals
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
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
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