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Unicellular plants and animals were first forms of life on Earth
humans are mammals, so if there were no animals, the only life on Earth would be plant life
If some animals on earth do not have a skeliton, then why would they have bone marrow?
Because earth is the only planet that has life on it if it weren't for earth there would be no such thing as humans and animals and plants and school and you.
The "life cycle" would be broken and life on earth would stop.
Water allows people and animals to survive. With out water, all life on Earth would die. Even plants could not live.
All life is on Earth, none on Mars.
If Earth had no deserts, there might be more suitable space for farmland. The current desert animals wouldn't have evolved, but the area would probably be more hospitable to life in general.
Plants came first in the evolution of life on Earth, appearing before animals.
no, Animals are important in maintaing eco systems. Animals help to regulate isect population, lant growth and soils. However more important are the insects, in fact if only the insects all died, all the animals on earth would die within 50 years. However if all humans died life on earth would flurish.
You would fins plants and animals in the troposphere, where we live on earth
Because plants are eaten by animals, almost all life on Earth is directly indirectly...