Which Is NOT a Parasitic Relationship

question 55

Multiple Choice

Which is NOT a parasitic relationship?

• A)The Dutch elm disease fungus infects and kills elm trees.
• B)The yellow fever virus causes fever and sometimes kills humans.
• C)A female tick fastens to the skin of a human host and draws blood for nutrition to make her eggs.
• D)The trichina worm burrows into muscle tissue,forms a cyst,and waits to continue its cycle until a predator consumes the host.
• E)Unsightly dandelions sprout in a yard and compete with the fescue grass for sunlight.

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Taxes levied by the United States federal government on the annual earnings of individuals, corporations, trusts, and other legal entities.

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The total revenue of a company minus the total expenses, indicating the profit earned over a specific period.