This question has two parts
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Text:
In animal populations, genes help determine when organism will breed during the year. Scientists have observe that the distribution of the time of year breeding genes in animal populations has been changing as average global temperatures increase. Red squirrels in Canada are one example of a population that has shown a shift in the frequency of certain genes. Scientists have observed the genes related to breeding earlier in the spring increasing in red squirrel populations. The chart shown below provide some information about red squirrels.
The data about red squirrels:
- Red squirrels frequently produce once a year
- Mating season is spring
- Red squirrels don't hibernate, but they store food for winter because food is less available
- Their diet is mostly herbivorus; sometimes eat insects, eggs, small birds/mammals
Part A: Describe ONE survival advantage for red squirrels to breed earlier in the spring.
Part B: Identify and explain the mechanism by which the gene for breeding earlier in the spring can increase in the red squirrel population over time.
