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

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.

Democracy cannot succeed unless those who express their choice are prepared to choose wisely. The real safeguard of democracy, therefore, is education.

Well, after I had the heart attack, it was a very simple choice. What the doctor told me I did and I did it religiously. I ate nothing but lean turkey breast or chicken breast or a piece of fish that was very lean. I mean I stayed away from everything.

From now on it is only through a conscious choice and through a deliberate policy that humanity can survive.

We believe that the European Union is facing a truly historic choice.

If you're a sports fan you realize that when you meet somebody, like a girlfriend, they kind of have to root for your team. They don't have a choice.

We choose what attitudes we have right now. And it's a continuing choice.

To say that an artist sells out means that an artist is making a conscious choice to compromise his music, to to weaken his music for the sake of commercial gain.

We in this Congress have a choice. The American people have a right to exercise a choice on this issue, as to whether our men and women will continue to fight and die in a war based on deception and fantasy, or to start bringing the troops home.

The choice is between which mistake is easier to correct: underdoing it or overdoing it.

A man can't be too careful in the choice of his enemies.

We need to teach the next generation of children from day one that they are responsible for their lives. Mankind's greatest gift, also its greatest curse, is that we have free choice. We can make our choices built from love or from fear.

I don't know whether these people are going to find themselves, but as they live their lives they have no choice but to face up to the image others have of them. They're forced to look at themselves in a mirror, and they often manage to glimpse something of themselves.

You always do what you want to do. This is true with every act. You may say that you had to do something, or that you were forced to, but actually, whatever you do, you do by choice. Only you have the power to choose for yourself.

It will be of little avail to the people that the laws are made by men of their own choice if the laws be so voluminous that they cannot be read, or so incoherent that they cannot be understood.

Soap opera wouldn't be my first choice, but at this point in my life, I would consider a soap. It would allow me to act and still do other things with my life.

Where we have the choice between putting a dollar against those that are going to advance horizontal integration and those that are going to sustain current capability, we'd rather put them against the horizontal integration activity.

Man is made or unmade by himself. By the right choice he ascends. As a being of power, intelligence, and love, and the lord of his own thoughts, he holds the key to every situation.

At only 20 years old I got married. I was still a kid myself, but in those times, if you got someone pregnant, you had no choice but to get married. So I left school and the only thing I could do was sing.

And before our current legislature adjourns, we intend to become the first state of full and true choice by saying to every low and middle-income Hoosier family, if you think a non-government school is the right one for your child, you're as entitled to that option as any wealthy family; here's a voucher, go sign up.

It was never really my choice to be an action heroine.

This war of choice in Iraq is undermining the very fabric of American society.

Confronted with the choice, the American people would choose the policeman's truncheon over the anarchist's bomb.

There are plenty of lesbians in Hollywood, but they're not out. And that's their choice, but I can't do that, it's too important to me.

Democracy is supposed to give you the feeling of choice, like Painkiller X and Painkiller Y. But they're both just aspirin.

I will argue my points; I will have my opinions. But at the end of the day, it's the director's choice.

While war is never anyone first choice, sometimes it is a necessary choice.

A man has free choice to the extent that he is rational.

Anything you can do needs to be done, so pick up the tool of your choice and get started.

I expect the Republicans will enjoy a large bounce out of their convention. They're here wrapping themselves in the 9/11 flag, which I think is inappropriate in many ways, but it's their choice.

I could do John Wayne, Jack Benny, Jack Kennedy, Lyndon Johnson and entertain my friends. But I never seriously considered it as a career choice.

As Americans, we can choose where we work and live, what we drive, which insurance plan is best for us, so why can we not give workers a choice when it comes to their retirement?