Final answer:
Mosquito populations in Brazil would likely decrease under very hot and dry conditions due to a decline in offspring production by parous female mosquitoes.
Step-by-step explanation:
Based on the information given, if the climate in Brazil shifted to very hot (above 30°C) and very dry (below 60% humidity) conditions for an extended period of time, the mosquito populations would likely decrease, possibly reaching zero. Since temperatures above 30°C are the upper limit for parous females, which are female mosquitoes that have produced viable offspring, there would likely be a significant drop in offspring production. Additionally, drier conditions below 60% humidity would also contribute to the decline in mosquito populations, as these are the lower limits for producing offspring.
Mosquito populations would decrease at temperatures above 30°C and humidity below 60%, as these conditions are not favorable for offspring production by parous females. The upper temperature limit affects the viability of offspring, and drier conditions limit the lower limit for offspring production. Therefore, if the climate in Brazil shifted to very hot and very dry conditions, mosquito populations would likely decrease or potentially reach zero.