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Biologist: Some speculate that the unusually high frequency of small goats found in island populations is a response to evolutionary pressure to increase the number of goats so as to ensure a diverse gene pool. ████████ ████ ███ ████████████ ███████ ██ █ █████ ██████████ ███ █████████ ██ █ ███████████ ███ ███ ████ ████ ██ ████████████ ████████ ████ ███ ██████ ███ ███████ ████ ██ ███ ███████ ██ █ ████ ██████████ ██ ████ █████████ ████ █████ █████ █████████ ███████ ████████████ ███████ ████ █████ ██████ ████████
Summary
The biologist refutes the view that the high frequency of small goats on islands is due to evolutionary pressure to increase the number of goats. Why is this wrong? The only way a trait can increase in frequency is through reproductive success, Therefore, the only evolutionary pressure that could cause this phenomenon is small goats achieving greater reproductive success.
Strongly Supported Conclusions
The biologist considers the speculations she refers to to be incorrect.
Small goats have greater reproductive success in island populations than larger goats.
Ensuring a diverse gene pool does not qualify as evolutionary pressure.
22.
The biologist's view, if true, ████████ ███ ████ ███████ ███ █████ ███ ██ ███ ██████████
a
The evolutionary pressure ██ ██████ █ ███████ ████ ████ █████ ████ ███ ██████ ██ ██████████ ███ █████████ ██ █ ████ ███ █████ █████
b
The unusual frequency ██ █████ █████ ██ ██████ ███████████ ██ ███ █ ██████ ██ ███ ███████ ████████████ ███████ █████ █████ ███████ ████ █████ ██ ████████
c
Contrary to what ████ ████████ █████ █████ ███████ ███████ ████████████ ███████ ████ █████ █████ ████ ████ █████ ██ ████████
d
The evolutionary pressure ██ ██████ █ ███████ ████ ████ ████ ███ ████ ███ ██████ ██ ██████████ ███ █████████ ██ █ ████ ███ █████ █████
e
A diverse gene ████ ██████ ██ ████████ ██ █ ████ ██████████ ██████ ███ ███████ ████ ██ ███ ███████ ██ ████████