Classification Pt 2

Question 1

Artificial classification

Answer 1

Convenience
Based on few characteristics 
Not reflective of evolutionary relationships 
Provides limited info
Stable

Question 2

Natural classification

Answer 2

Genus , family , species etc. Based on how closely related species are

Uses many characteristics
Reflects evolutionary relationships
Provides a lot of useful info
May change w advancing knowledge

Question 3

Phylogeny

Answer 3

Study of evolutionary relationships between organisms

Question 4

Darwins 4 observations

Answer 4

1. Offspring appear similar to parents
2. No 2 individuals identical
3. Organisms have ability to produce large no. Offspring
4. Populations in nature tend to remain fairly stable

Question 5

Darwins 4 conclusions

Answer 5

1. There is a struggle to survive
2. Better adapted individuals survive and pass on their characteristics
3. Overtime a number of changes may give rise to a new specie

Question 6

Evidence for evolution

Fossil evidence

Answer 6

• in the past, The world was inhabited by species that were different from those present day
• Old species died out new ones arisen
• New species that have appeared often similar to old ones found same place

Question 7

Evidence for evolution biological molecules

Answer 7

• Certain molecules found throughout the world - if one species give rise to other likely to have same biological molecules suggest or species arose from one original specie
• Two closely related species will have separated any recently biological molecules likely to be identical similar
• species that took separate evolutionary path long time ago biological molecules different more
• evidence from molecules i.e. cytochrome C and other proteins shows this pattern of change