Why is it that if all green plants were extinct, all life on earth woudl be extinct?

Question

What do these "green" plants do that others cant do for life on earth?

Answer 1

Well, simply put those "green" plants produce oxygen as a byproduct which most animals need to survive. Also, they provide a large food resource for the majority of animals on the planet.

To elaborate, green plants contain chloroplasts, which are kinda like plant "lungs," that convert carbon dioxide, water, and light energy (photons) into energy (specifically glucose or sugar, oxygen, and water) by a process known as photosynthesis. The waste product of this process, oxygen, is an essential part of life. Without plants, the primary engine of the oxygen cycle would be broken and not long after all life on the planet would soon wither.

At the very least, without plants the food chain would be severely disturbed, leading to catastrophic starvation of most animals.

Answer 2

It's not true. While most life, and most likely all animals, would go extinct, there would be plenty of bacteria (especially archaebacters) around. All life that requires oxygen or feeds directly or indirectly on green plants (and that's most species of animals and fungi) would die.

Answer 3

Well if any plants on earth where extinct we would be dead because they give us oxygen and we only have so much oxygen. It also feeds the other things we eat like cows, pigs. so if that happens say by by to your family!

Answer 4

I believe there are very deep fish and other sea creatures that get there energy from the earth's core.

So I'm not convinced that the premise is true

Answer 5

If your referring to algae in the sea then yeah we could at worse health and smaller populations.

Plants are a good way to get oxygen period

Answer 6

the recycle of oxygen back into the atmosphere

Answer 7

Because then all the animals wouldn't have anything to eat and we wouldn't have vegtables and so everthing would die!!!