All nematodes are parasitic or otherwise cause harm to animals and plants. True False Which class of Cnidarians lacks a

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All nematodes are parasitic or otherwise cause harm to animals and plants. True False
Which class of Cnidarians lacks a medusa stage entirely? Scyphozoa Hydrozoa Anthozoa Cubozoa
Which of the following would be the most effective strategy for preventing Dracunculus (Guinea Worm) infections? Improved sanitation to avoid contamination of the soil with feces Boiling or filtering water before drinking Controlling or reducing the local mosquito population Wearing shoes and washing hands after working in the garden
Which of the following activities is the most likely to lead to a tapeworm infection? Being bitten by a mosquito carrying juveniles Eating insufficiently cooked meat with encysted juveniles Walking through contaminated soil Ingesting the adult worm