Unit 4, classification/binomial system

Question 1

What is binomial system?

Answer 1

-first part is genus, second part is species
-scientists uses it to name species
-universal
Eg) tiger= Panthera Tigris, jaguar= panthera onca, both are panthera so same genus so closely related

Question 2

Why do different species look similar?

Answer 2

Eg) a camel and a llama
-live in similar environments (climatic)
-have similar selection pressures
-similar alleles will have the selective advantage
-produces similar/same proteins, so have the same characteristics

Question 3

What is hierarchy in the classification system?

Answer 3

-smaller groups arranged within larger groups
-no overlap between groups, so multiple species in genus can’t make fertile offspring

Question 4

What is the classification system order?

Answer 4

Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species

Question 5

How can you remember classification system order?

Answer 5

Dear king Phillip came over for good soup

Question 6

Why should you use the classification system?

Answer 6

-understand relationships between organisms and keep track of changes (eg, endangered species)
-universal
-based on putting organisms into groups, eg) DNA sequences

Question 7

What are the ways to classify?

Answer 7

Originally based on - looks, appearance, behaviour, fossils
Modern based on- DNA sequence, mRNA sequence, amino acid sequence, immunological ( compare antibody and self antigen shape )

Question 8

If the sequence of two organisms your trying to classify are close together what does that mean?

Answer 8

More closely related

Question 9

What is phylogenetic classification?

Answer 9

• arranges specie into groups according to their evolutionary origins and relationships
  -phylogeny tells us who is related to whom and how closely related they are
  -all organisms have evolved from share common ancestors (relatives) on phylogeny tree