Answer:
Roundworms can grow up to 3 meters and can be so small they can't be seen with the naked eye. Some roundworms have hooks to cling to certain body parts without being carried away by blood or other fluid. Roundworms are covered in a strong, but flexible, covering
Explanation:
Lungs have a pulmonary circulation
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With chromosomes crossing over frequently, it's more likely that genetic defects will occur in offsprinfg.
It's know as chemical equilibrium
