Evolution

Question 1

Explain how this change in phenotype is observed has developed over a period of time.

Answer 1

1. By natural selection
2. Explain how variation
   - spontaneous mutation in gene…
3. selection pressure
   - e.g predation
4. Selective advantage
   - better able to survive and reproduce to pass on advantageous allel to off springs
5. Change in allele frequency and gene pool
   - micro evolution occurs as allel frequency increase over time, increasing gene pool of the population

Question 2

Types of selection pressure

Answer 2

Temp, light, water

Predation, competition for resource, disease

Pollution, antibiotic resistance

Question 3

Explain how this supports Darwin’s theory of evolution

Answer 3

… supports Darwin’s theory of descent with modification

How:
Shows common ancestor
Shows accumulation of different modifications over time due to natural selection with different selection pressures

Question 4

What is anatomical homologous and what it shows

Answer 4

Having similar physical strictures with different functions inherited from common ancestor

Shows:
- Accumulation of different modification as a results of NS with diff SP
- divergent evulotion

Question 5

Fossil records and what it shows

Answer 5

Preserved remains of past organisms showing structural changes over time

Shows:
- Accumulation of different modification as a results of NS with diff SP
- transitional forms

Question 6

Molecular homology and what its shows

Answer 6

Similarities in DNA, RNA and protein seq across species

Shows:
- Accumulation of different modification as a results of NS with diff SP

Question 7

Biogeography and what it shows

Answer 7

Geographic distribution of species

Shows:
- adaptive radiation
- divergent evolution
- convergent evolution