Do you think man is a vegetarian by nature

if our ancestors were monkeys then we must be designed for eating plants and not meat. thats what i feel

Gorillas do also eat meat. Not all ape animals eat just vegitables. So if we did evolve from apes then it makes sense that we'd eat similar objects.

i totally agree with you . we are a highly adaptable species

but do u think the killing of other living beings is justified for our greeds

The answer to your question would depend on the religion of the person.

For me personally, I am inclined to feel that killing another for food is somewhat wrong. Am I really worth its sacrifice? Who am I really? I can't be sure I am that deserving.. but then away, I have been brought up with an omnivore kinda of diet so it's quite hard for me to ween off meat. And the crucial thing is, I don't eat vegetables (since young, I just can't make myself like them)... so if I stop eating meat (or fish for that matter) and I don't eat vegetables... what do I eat?:P

humans do not require to eat meat for their sustainance they can very well sustain themselves with vegetarian food. eating meat is not a sustainance issue. its more of leisure luxury for our tongue.
in case of lion and antilope its the question of sustainance

our teeth as they are today could be a outcome of our highly adaptable nature

So did our evolutionary ancestors have teeth that were appropriate for eating vegetables and not meat? When did hominids begin eating meat? Yours is a valid question, what about you try to do a little Wikipedia or Google search on the matter and tell me whether the results corroborate your supposition?

[Please note, this is NOT a bait neither a loaded question. I genuinely don't know about the eating habits of our evolutionary ancestors; I'm curious to what you will find about this.]

you need not kill the entire plant to have vegetarian food. you can pluck only a few leaves or fruits and the plant can grow again;in fact the plucking of fruits helps in distributing the seeds elsewhere and the species spreads to other areas.
but in case of animals you have to kill it entirely which is much more cruel

But Sometimes you do need to kill. And remember, many times the plants, even when not needed, they are killed, so the area can be replanted, or a new plant (sometimes you have to rotate the plants in the area, species A on year one, species B on year two, rest on year three, and so on). So either way it is about DEATH. Life lives by eating life. For a human being live he/she must EAT another former live being. You need to eat live beings (plant or animal) that were once alive and were killed so you can stay alive. You can't deny it.

You can argue if it is more cruel to kill an animal. Ok, from my viewpoint, which I do not claim to be right to everyone, I am ok with animals being killed so I can enjoy their meat, well cooked. And I don't really care if they suffer or not. But either way, veg or omnivore, the death of another(more than one) live being was necessary for your, or mine, survival and in absolute numbers, many more plants are KILLED than animals to sustain a number of human beings.

Death is always necessary and part of life, so Life can continues.

life lives by eating life

this is what is happening, but i am trying to quetion whether it is really necessary that life should live (only) by eating other life

i am trying to question whether as humans we can change the above statement.

can we say that "life does not necessarily have to live "ONLY" by eating other life

can we not live without killing the entire plant

It will probably be technically possible, someday. Who knows, synthetic food, better forms of producing and processing organic food to supply our needs without the need to kill other beings. But that's something for the far future, and we have other problems right now that are WAY more important than this idea.

As long as there are children dying of hunger and aids in third-world countries, I'll never care for the death of a million cows.

Absolutely agreed on that point

but what about the luxury and leisures of the tongue of the so called "first world countries"

there are some of them who wont even eat the non veg dish served at them just because the garnishing was not done properly or any such silly reasons.

what about the daily food wastages that happen in the so called "first world countries"

Do they really value food?

Do they have any concerns for such people who are dying out of hunger and hiv

That also happens in third-world countries. To a lesser degree, but it happens. And is all the more reason to worry about these substantial problems first. Of course I think a world where no animal NEEDS to be killed for sustenance would be nicer than the alternative, but I don't think it is a very important issue; not when compared to the kind of problems the world already has.

all that i am saying is

killing somebody for need is different
and killing somebody for mere luxury is different

and how important a certain issue is, is his or her personal perogative.

i think fargale has responded the best in this discusion but i dont know how to change the best reponse i have already marked. can anyone tell me how i can change it?

I'm afraid that's not possible... or at least, not that I know of.