what would Earth be like without plant life?
456886
oxygen free.  Life barren.  Real boring.
630213
We know that Earth has life on it so that is the most likely.\n\nMars is also a possibility although I would not expect the life to be alive when we get there (but it might be possible for us to thaw it out) due to the apparent lack of water and the atmosphere being a bit too thin.\n\nEuropa might have life under the ice in a liquid water layer.  It would seem to be big enough for life to evolve and the materials that are needed for life would actually be able to exist in forms that life could use along with the tidal heating from Jupiter.  This is probably the most likely place to have life but it isn't a planet.\n\nTitan has a rather thick atmosphere and organics so it looks like a candidate although it is a bit cold and doesn't have any liquid water (though hydrocarbons might be able to substitute) so a different biochemistry might be needed.  Of course this isn't a planet so it doesn't actually answer the question.
608779
No leaves = no photosynthesis.  No photosynthesis, no growth.
177229
The human race will survie with great difficulty. The average temprature of earth will plumit to near Zero degrees. World Strom Systems will become depleted of Water vapours thus creating huge famine all over the world.
51857
There is a chance that there is life not on earth, but think about the perfect conditions for life that earth has: the perfect temperatures, the correct mixture of oxygen and other gases, and of course, water. If there were life not on earth, it would probally be 1-celled organisms, and not what we would expect.
875787
Well, this happened once before.  Originally the earth had a very low concentration of atmospheric oxygen and oxygen was toxic to most organisms (they were all single celled back then).  But as organisms started to develop photosynthesis, oxygen was released into the atmosphere in huge amounts causing a massive extinction.  Now most organisms need or tolerate oxygen.  I'm not sure what would happen if the %O2 was increased now......I bet that plants wouldn't like it though.
95990
It's relative. There would be no life AS WE KNOW IT. But that's not to say an alternate form of life would not have developed. Who knows, the universe is astoundingly big.
362689
Universal.\nPlants are producer organisms converting sunlight and minerals into food that we can eat. They absorb carbon out of the atmosphere, produce oxygen and as importantly pump water from the ground into the air, making more water available as rain and preventing salt from building up in the soil surface (salination). Plants prevent soil erosion through slowing the impact of rain and wind. They provide wood for fuel, building and paper, they provide homes and food for myriads of other animals, and without plants we would be in a sorry state of affairs. Plants beautify the landscape and make us feel better about our surroundings. Plants are good things,
692139
Assuming that humans don't destroy the world...which is a pretty BIG assumption, I think maybe in a few thousand years the Earth's magnetic field may weaken to the point where it no longer deflects the harmful radiation from the sun and all life as we know it on this planet will cease to exist, and Earth will become very Mars-like...a very thin atmosphere and no surface water. But hey, that's just me.
26003
Absolutely.  \n\nHow long depends on what you consider destroyed.   Chances are we'll be long gone before the planet is left abandoned by our own dieing sun which is about 1/2 way through it's life cycle.  From the linked Wikipedia artical, it claims that the earth won't be engulfed and vaporized by the sun, but it won't be a good thing one way or the other.\n\nWhat happens after we have no sun is tough to say, but you could probably argue that at that point if not long before the earth would be unable to support life.
740044
We live in a biosphere and air, gravity, etc are key components, if any of its constituent parts were removed and not replaced, life on this planet would end.
517391
well you say animals...so I think the first animals would have been similar to that of fish due to the large area occupied by water. And they would have no bone, probably use their skin to breathe.\nIf you're talking about bacteria...then yes, it would have to anaerobe because it is believed that the first form of life was some sort of bacteria and at that time there was no oxygen present.\nAnd I think plants too were first found in water.
80460
If you address this question from a scientific perspective and not necessarily a theological perspective, you will realise that originally the earth was nothing more than a big lifeless rock.\nSome people believe that life was brought here on earth from extraterrestrial origins.\n\nIf this be the case, then even if all life on earth is destroyed, there is a definate possibility that the seeds of life that were brought to earth countless millenia ago may also restore life countless millenia in the future.\n\nShould you wish to disagree with this theory, then scientifically speaking, it is probable that the process which caused life to erupt on earth - a lifeless rock eons ago, might reoccur in the future.\n\nSo, is there a possibility that a new life may be created if all life on earth was to end? Yes, there is a possibility.
154530
What will happen is that the plant will die coz chlorophyll is a pigment in plants that enables the plant to produce it's own food for survival so without chlorophyll it won't be able to produce it's own food thus resulting to death of the plant.
709262
Don't forget that large bodies like the earth itself, and the sun, are themselves held together with gravity.\n\nProbably the first thing that we would notice is that the earth would immediately lose its atmosphere as it went flying off the planet into space, as would the oceans.  Everything on the surface of the planet would go flying off due to the centrifugal force of its spinning ... buildings would just rip off their foundations like cheese shaking off a cheese-puff.  Without an atmosphere, it's doubtful you and I would live more than 15 or 30 seconds.\n\nThe earth  would immediately break apart in a big cloud of hot liquid iron (the core of the earth) and all the stuff on the surface.\n\nThe moon would also disolve into a huge cloud of hot rocks and sand.\n\nThe sun would explode rather violently, as the pressure from the burning of the inner core would suddenly have no force counteracting it.  The same would be happening to every star and planet in the universe.  And galaxies themselves would fly apart (as they too are held together with gravity).\n\nAnd yes, what is left of the earth would fly away from what is left of the sun ... although it would be quickly overtaken by the exploding sun.\n\nBut, of course, it ain't gonna happen.  I'll bet everything I own on it.  :-)  \n\nThink of this as a great way to get back in with your girlfriend ... "Hey baby, if gravity were suddenly to disappear, we need to be holdin' each other really tight!"  (You take it from there).
415792
There is no other explanation for plant life.\n\nThere is no other explanation for animal life.\n\nThere is no other explanation for YOU, \nthe entity that lives in a flesh body.\n\nThere is no other explanation for Earth,\na planet that supports all this life.\n\nThere is no other explanation for the universe.\n\nThere is no other explanation except God and His Word.\n\nThere are only man's theories and conjecture.\n\nMan a very fallible entity.
1010143
I think it's possible there are forms of life that are evolving so that they don't need water. \nA few millions of years ago, earth was contaminated with a new deadly poison. It's called Oxygen. It killed most of life on earth and new life forms evolved that actually us that poison and are dependent on it for lie. Maybe the same thing can happen with water.