2006-07-19 02:12:12 · 11 answers · asked by Pat 2 in Science & Mathematics ➔ Zoology
Bear, warm-bloodedness is a more "advanced" trait, and was evolved probably from a group of creatures called Archosaurs. Some archosaurs evolved into ornithodira, which were the forerunner for dinosaurs and birds. If ornithodira were warm-blooded, then (most likely) all of their decendents would also have been warm-blooded, and many scientists now believe that most dinosaurs were warm-blooded rather than cold-blooded.
At any rate, and back on topic - a bird's beak is simply a specialized jaw. It has the same basic bone structure as any other living vertebrate jaw, the only difference is how it's shaped and what it's covered with.
Birds have different beaks because they eat different foods. Short, stubby beaks, like on finches, are good for crushing things like nuts, and long beaks (like on a hummingbird) are good for things like sucking nectar out of a flower.
2006-07-19 04:01:24 · answer #1 · answered by Brian L 7 · 0⤊ 1⤋
Different birds use their beaks for different purpose. A woodpecker has very long sharp beak, to drill out the worms from the inner part of the trees.
It is the same principle as the giraffe having a very long neck now; Do u know that long long time ago giraffe has very short neck as the horses? But got one time all the low level trees with the delicious tree leaves they love are depleted, so they have to go for the leaves on the taller trees; To reach, they have to stretch their neck.. In the long run, their neck become longer and longer.
Lol, this is evolution, change to suit the changes; It is happening all the time, it's just we can not see as the progress is really really slow
2006-07-20 03:53:32 · answer #2 · answered by a V a 4 · 0⤊ 0⤋
Different types of bird have different types of beaks. Hookbills for instance, are used for cracking nuts and seeds. You have eagles they have long pointy, sharp beaks for tearing fless and you have soft billed birds that are primarily insect eaters.
As for evolution of the beak..I'm not sure that they evolved that way..rather were like that way from the beginning. After all..science says that birds are one of the few creatures on the planet that hasn't really changed much since the age of the dinosaurs.
2006-07-19 09:24:08 · answer #3 · answered by Jenn 3 · 0⤊ 0⤋
There beaks evolved from dinosaur's beaks.Most likely from slicing meat,like shears.If bird's are direct descendant of dinosaurs,how could they go (hypothesis) from cold blooded to warm blooded animals.Kinda funny,I think they have something messed up there.
2006-07-19 10:00:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
As there became different food, they had to adapt their beaks so they would be able to eat the food. So over time their beaks changed.
2006-07-19 09:21:23 · answer #5 · answered by liz 2 · 0⤊ 0⤋
It's so they can peck into trees and ground to find food. It's a very good idea. Yay for evolution!!
2006-07-19 09:16:10 · answer #6 · answered by Lewiy 3 · 0⤊ 0⤋
they have different beaks for different foods
2006-07-19 09:15:49 · answer #7 · answered by Anonymous · 0⤊ 0⤋
how? mutaition/survival of the fittest. why? different food, habitat, or to fend off preditors (jk. i think).
2006-07-19 21:53:00 · answer #8 · answered by lamesox101 2 · 1⤊ 0⤋
No one actually knows. They just guess.
2006-07-19 17:43:38 · answer #9 · answered by neigeblanc18 2 · 0⤊ 0⤋
God made them that way
2006-07-19 21:29:53 · answer #10 · answered by boycrazy21491 1 · 0⤊ 0⤋