How are red blood cells able to move through narrow vessels to carry oxygen throughout a multicellular organism? (1 point)
Responses
They are small because they lack a nucleus.
They are small because they lack a nucleus.
They are flexible because they lack a plasma membrane.
They are flexible because they lack a plasma membrane.
They are long and thin with a tail-like end.
They are long and thin with a tail-like end.
They are small because their organelles are smaller than those of other cells.
They are small because their organelles are smaller than those of other cells.
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