Classification of Living things

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1
what is the other word for classification of living things?
Taxonomy
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2 types of Physical Structure
Analogous and Homologous
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Example of Analogous
bat and bird wing, desgins arose independently
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Example of Homologous
owls and magpies wing structures, because they were derived from a common ancestral structure
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What is Homologous structures?
  • Similar in anatomy, similar/dissimilar function, and inherited from a common ancestor
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What is Analogous structures?
not similar in anatomy, similar in function, not inherited from a common ancestor
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what is Homologous forelimbs?
one bone, two bones, lots of small cube like bones, several small but long bones
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Example of Homologus forelimbs
Dolphin’s flipper, bat’s wing bird’s wing, and a human arm
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What’s a Fossil Record
can help establish ancestry, not available for every organism, difficult/impossible to obtain DNA evidence from most fossils
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Genetic Similarities
much more accurate
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What does changer over time in genetic similarities?
DNA and protein sequences
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Genomic DNA sequencing
it can reveal how related two organisms are
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“Molecular clock”
Changes to DNA sequencing over time can be used as a…
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Cladogram
a diagram based on patterns or sharedelatedness derived traits and that shows the evolutionary relationships between groups of organisms
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Phylogram
A phylogenetic tree in which the length of the branches reflect the number of genetic changes that have taken place in a particular DNA or RNA sequence in the various lineages
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what are the Classification of Living Things
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
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Who developed the classification of living things?
Carl Linnaeus or Carolus Linnaeus
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Binomial system of classification
it is a system created by Linnaeus in which each species is given a two-word name; Genus+Species
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Eukarya
Domain of all organisms whose cells have nuclei, including protists, plants, fungi, and animals
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Animalia
Kingdom of multicellular eukaryotic heterotrophs whose cells do NOT have cell walls
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Chordata
the phylum of he animal kingdom that includes vertebrates
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mammalia
Class of mammals
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Carnivora
the order of mammals that includes seals, sea lions, walruses, and sea otters
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Ursidae
Genus
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Ursus Americanus
species
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Who discovered the three domains of life?
Carl Woese
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What are the three domains of life?
Eukarya, Archaea, Bacteria
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Eukarya
Fungi, animals, cellular slime molds, amoebas, green algae, land plants, red algae, forearms, ciliates, dinoflagellates, diatoms, euglena, typanosomes, leishmania
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Archaea
methanobacterium, halophiles, thermophoiles, and sulfolobus
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Bacteria
Cyanobacteria (pasties, including chloroplasts), green sulfur bacteria, spirochetes, chlamydia, mitochondrion, green nonsulfur bacteria
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whole-genome sequencing data
a lab procedure that determines the bases in the genome in an organism in one process
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In early evolution of the three domains of life, what the exchanged happened?
a lot of DNA exchanged between organisms
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Bacteria
small cells (1-10um)
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Bacteria
most forms are singular
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Bacteria
prokaryotic
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Prokaryotic cell
lack a nuclear membrane surrounding their DNA
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Bacteria
one chromosome (forms a nucleoid)
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how many chromosome does nucleoid forms?
1
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what shape is the chromosome of a bacteria?
circular
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is there a membrane-bound organelles in Bacteria?
no
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does it have a cell wall outside the cell membrane?
yes mostly
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the cell wall of bacteria contains Peptidoglycan or not
Yes
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what does the bacteria membranes composed of…
unbranched fatty acid chains
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bacteria is attached to glycerol by what type of linkage
ester linkage
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what type of reproduction does bacteria have?
Asexual reproduction common
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Asexual reproduction a.k.a
binary fission
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what is the most known pathogenic prokaryotic organisms?
bacteria
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what is spirochaetes?
gram-negatice bacteria that include those causing syphilis and Lyme disease
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whats the size of a eukarya
Large cells 100-1000um
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Eukarya has most form of
multicellular
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are all the eukarya are multicellular?
no there are some single-celled Eukarya for example is yeast.
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What is the term eukaryotic?
DNA bounded by nuclear membrane
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the genome of eukarya consists of?
several chromosomes
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are the chromosomes in eukarya linear or circular?
Linear
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what does the cell contains in eukarya?
membrane-bound organelles
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example of membrane-bound organelles in eukarya?
mitochondria
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Does Eukarya have cytoskeleton or not?
yes
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in Eukarya do they all have a cell wall?
not all
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those who do have a cell wall in Eukarya, what does it contains?
NO peptidoglycan
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what does the membranes composed of in Eukarya?
unbranched fatty acid chains attached to glycerol by ester linkages
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in Eukarya branched fatty acid chains is attached to? and by what linkage?
glycerol by ester linkages
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can eukarya reproduce or not?
sexual reproduction common
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In eurkaya, sexual reproduction common happens and it divided by?
mitosis and meisos
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what size is the archaea
small cells 1-15um
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archaea formation
singular
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is archaea prokaryotic or eukaryotic?
prokaryotic
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prokaryotic
lack a nuclear membrane surrounding their DNA
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Eukaryotic
DNA bounded by nuclear membrane
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in archaea how many chromosomes does it have?
one chromosome that forms a nucleoid
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in archaea does the chromosome forms circular or linear?
circular
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is archaea contains membrane-bound organelles?
no
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does it have a cell wall inside or outside the cell membrane in archaea?
outside
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the cell wall in archaea contains peptidoglycan or not?
no peptidoglycan
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in archaea does it have a branched or unbranched ?
branched
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in archaea what branch attached to glycerol?
Hydrocarbon chains
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in archaea, branched hydrocarbon chains attached to glycerol by?
Ether Linkage
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what type of reproduction happens in archaea?
asexual reproduction binary fission
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where do archaeas often live?
extreme environments
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what could be an example of extreme environments?
extreme halophiles and hyperthermophiles
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species
the most specific level. these organisms are so similar that they can mate and reproduce with each other
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Kingdom
plantae, animalia, fungi, protista, eubacteria, archaebacteria
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