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1. Which of the following is true about annelids?

a. Leeches are annelids worms.
b. Annelids worms are also known as roundworms
c. Annelids worms are also known as nematodes
d. Hookworms are annelids worms

2. What is the most aggresive competitior of coral reefs on the sea floor?

a. Flatworm
b. Enchinoderm
c. Sponge
d. Chidarian​