Answer Happy

As you learned in class, guppies in Trinidad exist naturally in river segments with large predators and above large waterfalls in river segments that lack large predators. Guppies can live for around 2 years in captivity and typically take approximately 2 months to become reproductively mature. For each of the following statements, determine if it is most likely TRUE (T) or FALSE (F).

When Dr. Reznick transferred guppies from high predation locations to low predation locations, he found a decrease in reproductive allocation and an increase in the age at maturity in the population over time. O True False

Trade-offs between traits like lifespan and number of offspring constrain the ability of natural selection to always favor longer lifespans. O True O False

Imagine a genetic variant that causes a benefit early in life (first 4 months of life) but causes a life-threatening disease once an individual reaches 1 year old. This variant would be favored more strongly in the low predation environments than in the high predation environments. True O False

Because natural selection should always favor higher reproductive output, guppy populations will always evolve to produce more and more offspring over time. True O False

Dr. Reznick's results were not consistent with the predictions from life history theory. O True O False