a. nematocysts
b. multicellular
c. radial symmetry
d. complete digestive tract with two openings
e. marine and fresh-water
2007-01-28 14:35:17 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Wow.. there was a question exactly like this one before, haha.
All cnidarians share everything but D. Cnidarians just have one opening, which acts as its mouth and anus.
Nematocysts is just another word for stingers, all animals are multicellular, radial symmetry is when if you were to draw a line through their body it would repeat (think of a starfish), and there are cnidarians in the ocean and fresh water places.
2007-01-28 14:47:34 · answer #1 · answered by cowswilltakeovertheworld 2 · 0⤊ 0⤋
D - Think jellyfish or sea anemone. They only have one body opening which is the mouth. That's an incomplete system.
2007-01-28 14:49:49 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋