Which Statement About the Snail-Trematode System Studied by Dybdahl and Lively

question 38

Multiple Choice

Which statement about the snail-trematode system studied by Dybdahl and Lively is false?

• A) Parasites infected snails from their home lake less effectively than those from other lakes.
• B) The most common genotype of snail often varied from year to year.
• C) The parasites can castrate male snails.
• D) The type of parasite varied from year to year.

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Scarcity

The fundamental economic problem of having seemingly unlimited human wants in a world of limited resources.

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