A Scientist Notices That a Population of Birds Has Decreased

question 20

Multiple Choice

A scientist notices that a population of birds has decreased dramatically within one year and suspects that a newly introduced snail population may be affecting the bird population.Some individuals within the bird population eat snails,primarily,while other individuals avoid eating snails.Which of the following statements represents a prediction based on a well-constructed hypothesis for this observation?

• A) If birds are affected by eating snails, then there will be a difference in the survival rate of birds that eat snails and those that avoid snails.
• B) If snails live in moist habitats, then snails will be eaten more frequently by birds.
• C) If birds consume snails, then they will have a higher body mass index than birds that do not eat snails.
• D) If snails that are sick leave their shells so that birds will consume them, then snail populations are protected from illness.

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