Evidence of epistasis from hybridization studies is more scarce.

Islands are known to differ in the food supply available to ground finches, mainly seeds.

To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a fixed manner but are determined by learning early in life.

Evidence of epistasis from hybridization studies is more scarce.

Plumage features constitute a major component of courtship signals.

The theory of founder effects does not explain how novel features like plumage traits arise.

The process of speciation is completed with the cessation of genetic exchange.

Almost nothing is known from hybridization studies about the inheritance of courtship behavior of females, or of their responsiveness to particular male signals.

Males transmit signals in courtship through behavioral displays.

Thus mating of females was strictly along the lines of paternal song.

Species can be recognized by their morphological characteristics and songs.

Thus the genetic basis to the origin of bird species is to be sought in the inheritance of adult traits that are subject to natural and sexual selection.

We observe closely related species in sympatry and infer how they evolved from a common ancestor.

Genes that underlie the capacity to receive, use and transmit information are the evolving properties.

The divergence of songs in the new population away from those in the progenitor population would only be prevented if these processes were balanced by repeated immigration and subsequent breeding: song flow.

Closely related species of birds are also chromosomally similar.

Exchange of breeding individuals between two populations tends to homogenize their gene pools.

The independent role of morphology in mate choice is revealed by the rare instances where the usual association between song and morphology is disrupted.

For me, music is all about emotion and attitude.

Live in the moment. Forget the past and don't concern yourself with the future.

The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect.

There's a huge cost that comes with illegal immigration.

Cricket is my life. Before the cancer, I was happy-go-lucky. I used to think about my career and worry about the future. But post it, my thinking has completely changed. I'm happy to eat and breathe normally. I'm happy to have my life back.

And if I don't sing, I don't get paid.

You have to love your children unselfishly. That is hard. But it is the only way.

There is no chance, no destiny, no fate that can circumvent or hinder or control the firm resolve of a determined soul.

Everybody now seems to be talking about democracy. I don't understand this. As I think of it, democracy isn't like a Sunday suit to be brought out and worn only for parades. It's the kind of a life a decent man leads, it's something to live for and to die for.

Investors have few spare tires left. Think of the image of a car on a bumpy road to an uncertain destination that has already used up its spare tire. The cash reserves of people have been eaten up by the recent market volatility.

With just one polka dot, nothing can be achieved. In the universe, there is the sun, the moon, the earth, and hundreds of millions of stars. All of us live in the unfathomable mystery and infinitude of the universe. Pursuing 'philosophy of the universe' through art under such circumstances has led me to what I call 'stereotypical repetition.'

Harvard has enough panegyrists without me.

As it became clear that Senator Rubio was likely to run for president, I received encouragement to consider running for the Senate.

If it's scary, it's supposed to be scary. If it's funny, it's supposed to be funny. That's all I try to do.

If you just stay away from junk, and stick with what your mom taught you, you're eating pretty healthy.

We need above all, I think, a certain remoteness from urban confusion.

God, my brain really goes to mush when I'm pregnant.

Endurance in ministry is rooted in the eternal perspective. The absence of an eternal perspective makes you vulnerable to losing heart.

Running doesn't come easy to me, especially the first thirty or so minutes. My message is take it one step at a time.

The anger and the brutality against everything can readily from one hour to the next be transformed into its opposite.

I think we brothers realised his loss more and more as we grew older. We actually grew closer after his death.

Early One Morning takes time and, I mean, all things like that I felt were very important.

Everybody, I think, that was in 'Harry Potter' was certainly introduced to an enormous lot of young people.

I directed a half hour comedy pilot, 'Upgrade,' and had one of the best times ever! I had such a great time directing; I would love to get to direct another project.