Because Spiders have more than one cell - there isn't much more to say than that. Either an organism is composed of one cell or it isn't. A spider isn't.
Their Unicellular and Multicellular
Behold spiders: The Only Unicellular yet still Multicellular species on earth. =O
Cows are Multicellular organisms. Hope you Like it!.
multicellular
multicellular.
Multicellular
Behold spiders: The Only Unicellular yet still Multicellular species on earth. =O
Spiders are multicellular.
It is multicellular
It is multicellular.
Platypuses are multicellular. All mammals, and indeed all vertebrates, are multicellular.
cnidarians are multicellular
A sea star is multicellular.
A grizzly bear is a multicellular organism.
No, arachnids are things like spiders and scorpions. They're farr to big and complex to be single celled.
Bread mould is multicellular.
Yes, Hydra is Multicellular.
No. Protists are unicellular, or unicellular organisms which form multicellular structures. Arthropods, including insects, spiders, crabs, lobsters, etc., clearly aren't unicellular. They belong to the kingdom animalia.