Answer: Animals excrete water by respiration and by passing urine.
Vaccine is preventing the infection.
Antiviral is a medicine taken after infection
Answer:B. Protista eggs and sperm
Explanation: helminths are parasitic worms that inhabits the intestinal tract of humans; they live within the host and have attachment organs which enable them to reside within their host; examples include: roundworms (Nematodes), tapeworms ( Cestodes) and flukes( Trematodes)
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