C9) Why would a female peacock choose a male peacock with male? a more pronounce

Question

C9) Why would a female peacock choose a male peacock with male? a more pronounced tail than another C10) You discover three closely relates species of betles. If you foro breed, you get offspring, but they are sterile. Forced breedings between B and C, yield eggs that don't hatch. Which two species are more species A and C, or between )Why is allopatric speciation more accepted in the scientific community than sympatric speciation? C12) What are some of the contributing factors to the extinction of species? rlbilniougeo ogeocas relationships? C14) Why should synonymous mutations be treated differently from non-synonymous mutations when working out phylogenetic phylogenetic relationships? C15) How does paraphyly differ from polyphyly? C16) What effects have retrotransposons had on the evolution of genomes? C17) What is the importance of mutation rte in the neutral theory of molecular evolution? C18) What are the key morphological changes in the human lineage that led to bipedalism? C19) Starting with Homo habilis, describe the history of the emergence of this genus from Africa in to other parts of the world. C20) How has sociality and creativity affected the evolution of the human species?

Explanation / Answer

9 - Natural selection of peacock :

The classic example of mate choice is a peacock’s tail.

Peahens prefer peacocks with large and colourful tails, so those peacocks get to mate more frequently and have more offspring.

The male peachicks will inherit the genes for a long and colourful tail from their father and so will have a similar tail.

Peacocks with extravagant tails will have more children, since they are more successful at attracting a mate; as a result, the peacocks in the next generation will, on average, have more extravagant tails.

This is where things get interesting: since the tails become more and more impressive from one generation to the next, peacocks constantly need to do better and better to get the attention of a peahen.

Each generation, the peahens prefer the peacocks with the most impressive tails, which leads to an increase in the average tail quality in the next generation, when the peahens will again select peacocks with the best tails, leading to an increase in quality, and so on.

This positive feedback, which is a hallmark of sexual selection via mate choice, leads to a runaway process where courtship signals become more and more extreme.

10 - Beetles closely related species :

Species A and species B are closely related becouse when forcefully breed with species A and B they get offsprings but when forcefully breed with another two pair of species ( B with C & A with C ) they yield eggs that dont's hatch.

11 - Allopatric speciation v/s sympatric speciation :

Allopatric speciation takes place in different geographic regions but not the sympatric speciation.

Allopatric is the commonest mechanism of forming new species compared to sympatric mechanism.

Geographical isolation or divergence has to take place in allopatric speciation, but the driving force for the formation of new species in sympatric speciation is the genetic or sexual isolation.

12 - Contributing factors to the extinction of species :

Wildlife extinction results from many forces operating in the society, such as economics, politics and psychology, the specific activities that cause extinction of species and the relative importance of each.

Some factors affect wildlife directly and others affect it indirectly.

- Alteration of habitat

- Commercial sport and subsistence, hunting

- Introduction of foreign species

- Cantrol and pests predators

- Collection for zoos, private collections and research

- Pollution

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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