Divergent Evolution

Divergent evolution

The processes of tracing back two or more species to their common ancestor that indicate how they have diversified and diverged. (same ancestors different functions) an example are the Finches.

Convergent evolution

Different species that adapt to their necessities. They take the same function and form physical or chemical. (Different ancestors same functions). An example is wing, bats and birds.

They are important because they need to survive in different places in the earth, they adapt to their surroundings taking different functions depending on their species, they have to be different to adapt to different costumes, and it is part of the evolution.

Are Homology and Analogy found only in the phenotype?

Yes, they are morphologic changes and adaptations on the species almost every time.

Can we find homology and analogy in a molecular structure?

Yes, there is Analogy and Homology in molecular structure,

The homologous chromosomes

Analogy structures that have same function but different origin.

Homologous: A state of similarity in structure and anatomical position but not necessarily in function between different organisms indicating a common ancestry or evolutionary origin.( same ancestors, different functions)

.EXAMPLES: forelimbs of humans and dolphin fins, or bat wings.

Analogy: Structural or behavioral similarity in terms of functions between unrelated species or organisms but do not share a common ancestral or developmental origin. (Different ancestors, same functions)

EXAMPLES:

Shark fins versus dolphin fins.

Moth wings versus birds wings.

Octopus eye versus human eye

The wings of a fly, a moth, and a bird are analogous because they developed independently as adaptations to a common function—flying.

Darwins natural selection

1 Variation is differences between individuals of a species. In humans these are things such as height, skin color, eye color, and muscle to fat ratio, bone density and so on.

2. Variations can increase the likelihood of an organism surviving. A moth with brown wings will be harder to spot than one with white wings in a forest environment. The white moth will be spotted by more often by predators and will have less chance of surviving.

3. When there are too many of an organism in an area they must compete for resources such as food and perhaps shelter eg trees and caves.

4. The animals that survive can pass on their genes (because they are alive to do so). This means that animals most likely to survive are most likely to pass on their genetic material to the next generation. This means their offspring are endowed with any genetic advantages that their parents had.

5. Over time the many small

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