Select an adaptive trait common to more than one species. For example, birds and

Question

Select an adaptive trait common to more than one species. For example, birds and bats both have wings.

Explain what makes this trait an adaptation.

Briefly describe how the trait evolved; e.g., mutation, genetic drift, migration and/or natural selection. Be sure to support your answer with evidence.

What is the difference between homologous and analogous traits? How does your trait of choice fit either of these descriptions?

What is convergent and divergent evolution? Describe whether the trait is a result of convergent or divergent evolution.

Explanation / Answer

An example of adaptive trait is the fins of turtle and whale. They both help in swimming.

This trait became an adaptation because the environmental conditions were similar to favor this trait and develop as an adaptation. It helps in better survival of the different species.

Homologous traits are the ones where the physical appearance is same but function is different. Whereas in analogous traits. function is same but structure is different. Our choice of trait fits the criteria of analogous structure, because the fins help in swimming of the two different species, but structure is different.

In convergent evolution, the variation takes places in two different species which don't share any common ancestor; they develop similar traits because they live in similar environments. They lead to development of analogous structures.
In divergent evolution, homologous structures arise; they share common ancestor and variation is due to change in environmental conditions so the function of the traits change accordingly to support the survival of the species. Our example was the case of convergent evolution.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.