Transcript Ch 18 Classification

1 Review Identify two goals of systematics
Explain Why do the common names of organisms
like daisy or mountain lion often cause problems
for scientists
Infer What characteristics could systematists use
to put organisms in a group
2 Review What is bionomial nomenclature
Explain What is a genus
3 Unity and Diversity Which category has more
biological meaning: all brown birds or all birds
descended from a hawklike ancestor- why
CH 18 CLASSIFICATION
18.1 Finding Order in Diversity
Assigning Scientific Names
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Biologists can be sure that they are discussing the
same organism
Common names can be confusing because they
vary among languages and from place to place
Cougar, puma, panther, and mountain lion are all
the same animal Felis Concolor.
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Early scientific names often used long phrases to
describe species in great detail
“Oak with deeply divided leaves that have no hairs
on their undersides and no teeth around their
edges”
Difficult to standardize names because different
scientists focused on different characteristics.
Binomial Nomenclature
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Two-word naming
system
Developed by Carolus
Linnaeus
Usually in Latin, first
part is capitalized and
second part is
lowercase
Genus species.
Polar Bear
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Ursus maritimus
Other member of the bear family share Ursus
maritimus is unique to polar bears
Second part of the name is descriptive.
Grey Wolf
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Wilk (Canis lupus) jest największym przedstawicielem
rodziny psowatych, osiąga długość do ok. 200 cm, ciężar
12-80 kg. Samce zazwyczaj są większe od samic o ok.
20%. Wilk jest przodkiem psa domowego. Spośród
zmysłów najlepiej rozwinięte ma słuch i węch. Wzrok
służy temu drapieżnikowi przede wszystkim do
lokalizowania poruszających się obiektów. Jest niezwykle
sprawny. Wilk to zwierzę szybkie, wytrwałe, mające
doskonałą technikę polowania
圈養新生灰狼(Canis lupus)成長紀實 — 行為發展.
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Systematics
 Science
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of naming and grouping organisms
Taxa
 Larger
groups of species that have biological meaning.
Linnaean Classification System
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Kingdom
Phylum
Class
Order
Family
Genus
species.
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But which similarities and differences are the most
important?