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Stack #1733383
Question | Answer |
---|---|
Scientists believe the blank were the first animals to exist in multicellular form. | sponges |
the whiplike structures sticking out of the sponge is called blank direct the current of water through the sponge. | flagella |
three phyla of worms are | segmented, round, and flat worm |
the flat worm has blank digestive system opening, the blank has two | one roundworm |
blank are segmented worms with a well developed body system including blank, blank, and blank | earthworms nervous digestive and circulatory system |
scientists believe that blank were the first group of animals to live on land and the first to have blank | arthropods jointed appendages |
examples of crustaceans are | crabs shrimp lobster |
examples of arachnids are | spiders ticks scorpions |
animals with backbones are blank |