Random scientist inc, How can dinosaurs and birds be closely...

Random scientist inc,
How can dinosaurs and birds be closely related and primates and humans be closely related without dinosaurs and humans being related? The theory of evolution doesn't work like that...does it? Either we are all related or we aren't related at all? Help!

The people who study genetics already know somewhat what our ancestors knew. You are what you eat. What diversity exists from evolution is because of the ability to digest the dna of other creatures and tie it into our genetics. If the dna or rna is not compatible, or wrong we tend to go towards or away from what makes us us. What science doesn't understand of the oldest people of the earth is if they kept tradition and ate foods that were supposed to be eaten, they would seem to be younger, but in essence, their formula doesn't take into account traditional eating. I think their system is flawed. If we have the dna of the dinosaur in us it could be their by various reasons. We could have eaten the dinosaur raw or the dinosaur could have evolved by wide diversity in food to us. Either way, destroying dna can revert us backwards and our intelegence can be destroyed and our physiology can start to change back. Chemicals in our food that are there to fight fungus and bacteria can be dangerous for our health. We rely on their presense in our body to keep us healthy and human. Our ancestors only came this far by living with these things of nature. I am not by any means trying to change anyone's diet only enlightening them to what I have discovered. To stay human eat what your ancestors ate, I don't know what you want to evolve to, but I like being me and I have respect for my ancestors to bring me to be here chatting. If I had defective genetics I would not exist. I just had to learn my father was smarter than a fifth grader, and smarter than me. I really don't care if my ancestors were dinosaurs or if they ate dinosaurs. I like a good burger, stew, pasties, and all fish and I also like vegetables. Whatever happens to me I am happy I had a chance to live. I hope my childgren and grandchildgren get the same opertunity and all of you also. Everything you and everything else in this world does seems to have a reason. Everything we do, somehow or other, makes a difference in this world. Sometimes good, sometimes bad, but eventually working in a set direction in the end. I don't know if what I write here now is right or wrong, we'll see I suppose.

Good definition, Rickymouse, let's see how I do.

Guest, look at the anatomical structure of the dinosaurs vs the birds; in simpler terms, look at their skeletons. You will find that dinosaur skeletons and bird skeletons share many similarities. Especially look at Archaeopteryx and Compsognathus. Some scientists think Archaeopteryx evolved from Compsognathus. In fact, when Archaeopteryx was first discovered, scientists thought it was a Compsognathus! It was cleared up when feather impressions were found. Scientists think Archaeopteryx is half bird half dinosaur, since its skeleton closely resembles a Compsognathus' skeleton.
Humans and birds are not related in any way, and neither are humans and dinosaurs. Primates and birds are not related in any way, and neither are primates and dinosaurs. You're dealing with an evolution known as "Macroevolution."
Basically, there are two types of evolution; microevolution, which is one simple change in one species, and macroevolution, which is the transition between one species and another (such as dinosaurs and birds). So basically, macroevolution is large-scale evolution, and microevolution is small-scale evolution. Birds evolved from dinosaurs, and man evolved from primates. The primates didn't evolve from birds or dinosaurs, and neither did the humans.
Well, that's my answer. I hope it helps. If there's anything else I can help you with, just let me know.

Random Scientist Inc.

Random Scientist Inc. wrote:

Humans and birds are not related in any way, and neither are humans and dinosaurs.

Well.. that is probably putting it too harshly.
I know that you want to emphasize how:

Birds evolved from dinosaurs, and man evolved from primates. The primates didn't evolve from birds or dinosaurs, and neither did the humans.

Which is absolutely correct.
But mammals and dinosaurs do share a common ancestry among the stem amniotes of the early Carboniferous period.
Our guest is right that according to evolutionary theory, all lifeforms are related. Right now I am preparing for a microbiology exam and many of the scientific articles we are to read describe genes shared by all lifeforms - both bacteria, plants, birds, and humans.

Perhaps it helps our guest to think of this common amniote-ancestor as a great-grandmother. Her great-grand children (humans and birds) are only distant cousins, but they are still related way back in time.
I made a crude drawing back in November of the amniote family tree for a question regarding Archaeopteryx. I believe it illustrates my point here as well (just replace "first reptiles" with "stem-amniote":