Evidence Used to classify organisms Flashcards
(6 cards)
1
Q
Outline the use of DNA to enable us to see how closely related species are…
A
- DNA codes for a particular protein by coding for a sequence of amino acids
- A particular piece of DNA/RNA code for same protein in diff species
- Enable us to compare
2
Q
What are some of the types of evidence used by scientists to classify organisms into groups determined by how closely related they are to each other?
A
- observable features (physical features)
- DNA (compare DNA base sequences of genes)
- Biochemistry of proteins (cytochrome C)
- Biochemistry of rRNA
- Behaviour
3
Q
Outline the use of biochemistry of proteins to enable us to see how closely related species are…
A
- looking at sequence of AA (det by DNA and diff in all species)
- degree in similarity in AA sequence in AA reflect how closely related species are
- cytochrome c protein used in respiration
4
Q
Outline the use of biochemistry of ribosomes rRNA to enable us to see how closely related species are…
A
- sequence of bases in rRNA is determined by DNA
- degree of similarity in the base sequences will reflect closely relatedness
5
Q
Outline the use of behaviour to enable us to see how closely related species are…
A
- courtship habitats
- feeding habitats
6
Q
Why are observable features as a mechanism for classifying an issue?
A
- can misrepresent true ev relationships
- as animals can independentley adapt to same environment
