Blue-green algae preceeded animal life by millions of years, sure, butGood points, Ben. Bob hasn't chosen a good argument here. For starters, the first insects appeared at about the same time as the first plants (early Silurian to early Devonian), so coevolution of plants and animals began early. Also, the first plants were moss-like, while we garden with flowering plants and grasses (grains), both of which evolved with animals, hundreds of millions of years after the first plants. And they've been heavily domesticated; they're about as far as you can get from the spore-bearing early land plants and still be called plants.
anything we would commonly recognize as a plant today requires animal
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