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What type of symmetry do worms have?
Bilateral symmetry
How does a worm reproduce?
Sexual and asexual
What does it mean by flatworms are parasite?
An organism that lives inside or on other organism
Name three major phyla of worms
flatworms, roundworms, and segmented worms
What does it mean by planarians are free-living flatworms?
They feed on dead ,decaying materials and attack smaller animals than them.
Which phyla of worms that does not have a digestive system that is like a tube, open at both ends?
Flatworms
Explain about the closed and open circulatory system.
Closed circulatory system : Blood moves inside the blood vessels, Open circulatory system: Blood leaves the blood vessels and sloshes inside the body
What is the role of earthworm in the environment?
It improves the soil in which plant grow. Earthworms tunnels loosen the soil, allowing air, water and plant roots to move through it
What are the characteristics of Bilateral symmetry?
Larger, more complex, move more quickly, have sense organ in the front end
What are the characteristics of radial symmetry?
Do not have distinct front or back ends, live in water, moved along the water currents/creep along the bottom
