Because a single cell isn't very complex. The more cells an organism has, the more it can specialize it's cells, such as all the specialized cells that make up your brain, stomach, skeleton, muscles, etc. An organism that is made up of only one cell, that one cell has to do everything that each of our specialized cells do.
A sea star is multicellular.
multicellular
A cat is multicellular. Multicellular organisms have more than two cells. A multicellular organism is one that can be seen without the need of a microscope.
A fish is multicellular, as is any complex animal.
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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.
Yes, Hydra is Multicellular.
Bread mould is multicellular.
Cows are Multicellular organisms. Hope you Like it!.
Deer are multicellular organisms. They belong to the animal kingdom (Animalia), specifically the class Mammalia. Deer are vertebrates and have complex, multicellular structures composed of specialized cells, tissues, organs, and organ systems. They are composed of billions of cells organized into various tissues and organs such as muscles, bones, nerves, and organs like the heart, lungs, and digestive system. Deer reproduce sexually and undergo development from a fertilized egg (zygote) into a multicellular embryo, demonstrating their multicellular nature as complex organisms within the animal kingdom.
multicellular
Monkeys are multicellular organisms.