Classification study guide Name ______ date ______ Earth is 4.5

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Classification study guide
Name _____________ date ________
Earth is 4.5 (ish) billions years old
life started 3.5 billion years ago (bya)
Miller and Urey’s experiment – know how they set it up
found amino acids, the building blocks of proteins
other found adenine, a building block of DNA, RNA, and ATP
earliest life – similar to Archaea probably
Prokaryotes: Archaea and Bacteria – no nucleus
Archaea – extremophiles – high salt, high temps, high pressure (deep ocean)
some live in “normal” environments
Next organisms were the true bacteria –
shapes: cocci (round), bacilli (rod-shaped), or spiral bacteria
cynaobacteria – photosynthesis – made the first free oxygen by splitting water during
photosynthesis
See chart that we made together
domains: Arachaea, Bacteria, Eukarya
Kingdoms: Archaebaceria
Eubacteria
Prokaryotes
Domain
Archaea
Bacteria
Kingdom
Archaebacteria Eubacteria
Examples?
extremophiles Strep
Classification study guide
Eukaryotes
Eukarya
Protists
algae
Fungi
mushrooms
Plantae
multicellular
autotroph
Animalia
Multicellular
heteroptroph
Name _____________ date ________
Earth is 4.5 (ish) billions years old
life started 3.5 billion years ago (bya)
Miller and Urey’s experiment – know how they set it up
found amino acids, the building blocks of proteins
other found adenine, a building block of DNA, RNA, and ATP
earliest life – similar to Archaea probably
Prokaryotes: Archaea and Bacteria – no nucleus
Archaea – extremophiles – high salt, high temps, high pressure (deep ocean)
some live in “normal” environments
Next organisms were the true bacteria –
shapes: cocci (round), bacilli (rod-shaped), or spiral bacteria
cynaobacteria – photosynthesis – made the first free oxygen by splitting water during
photosynthesis
See chart that we made together
domains: Arachaea, Bacteria, Eukarya
Kingdoms: Archaebaceria
Eubacteria
Prokaryotes
Domain
Archaea
Bacteria
Kingdom
Archaebacteria Eubacteria
Examples?
extremophiles Strep
Eukaryotes
Eukarya
Protists
algae
Fungi
mushrooms
Plantae
multicellular
autotroph
Animalia
Multicellular
heteroptroph
Know the characteristics of living things.
Homeostasis – maintain stable internal environment – such as blood pressure, body temperature in
mammals and birds
Are viruses alive?
Definition of a species – group of similar organisms breed in nature and produce fertile offspring
Domain – Kingdom – Phylum – Class - Order – Family – Genus - species
Linnaeus – classified animals by binomial nomenclature
based on how things work
Evolutionary classification – based on characteristics acquired through evolution
shown by a cladogram - be able to read a cladogram
Now we classify by DNA and proteins
mutations occur at a steady rate (mostly) so they can be used as a molecular clock to determine how
long ago two species had a common ancestor
dichotomous key – used to identify organisms based on physical traits
each step of the key has two possibilities – must be one or the other, cannot be both
be able to use a dichotomous key
What was early Earth’s atmosphere like?
was there free oxygen?
Know the characteristics of living things.
Homeostasis – maintain stable internal environment – such as blood pressure, body temperature in
mammals and birds
Are viruses alive?
Definition of a species – group of similar organisms breed in nature and produce fertile offspring
Domain – Kingdom – Phylum – Class - Order – Family – Genus - species
Linnaeus – classified animals by binomial nomenclature
based on how things work
Evolutionary classification – based on characteristics acquired through evolution
shown by a cladogram - be able to read a cladogram
Now we classify by DNA and proteins
mutations occur at a steady rate (mostly) so they can be used as a molecular clock to determine how
long ago two species had a common ancestor
dichotomous key – used to identify organisms based on physical traits
each step of the key has two possibilities – must be one or the other, cannot be both
be able to use a dichotomous key
What was early Earth’s atmosphere like?
was there free oxygen?
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