Interpret Evolutionary Trend Data Practice Test

A lizard population was monitored for the frequency of a heat-tolerance allele (H) during a period of warming.

Year → mean summer temperature (°C) → H allele frequency:

• 1990: 27°C → 0.18
• 2000: 28°C → 0.24
• 2010: 29°C → 0.33
• 2020: 30°C → 0.46

Which interpretation best fits the data?

In a bird population, the frequency of a color allele (G) was recorded every 10 years.

Year: 1980, 1990, 2000, 2010, 2020

Allele G frequency: 0.50, 0.51, 0.49, 0.50, 0.50

Which interpretation best matches the data?