Cell Differentiation and Specialization — Unit test
Question 21 • PMHS Biology I Q2
A species of mud snail was studied for five years. During this time, scientists observed the season in which they mated, the number of offspring they produced, and the results of such stressors as drought, famine, and lack of mates. Which question were the scientists most likely studying?
Answer
A
What is the food source most often chosen by the mud snail?
B
Are the reproductive rates of mud snails affected by environmental changes?
C
Are mud snails more likely to choose mates with colorful shells?
D
Do mud snails prefer to live in water or near a water source?
Explanation
The scientists tracked mating seasons and offspring numbers, which are measures of reproduction. They also observed stressors such as drought and famine, which are environmental changes that could affect reproductive success. Therefore, they were most likely studying whether environmental changes affect mud snails’ reproductive rates, choice B.
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