Question

bird beak size is often related to the type of food the bird eats and the size of the food source. some birds eat seeds as food. birds with large beaks are better able to eat larger seeds, while birds with small beaks typically eat smaller seeds. an environmental change occurred that resulted in a reduction in one type of food, namely small seeds. the change caused a shift in the distribution of beak sizes observed. the graph shows the distribution of birds of various beak sizes before and after the change. select two processes that are most likely to cause the variation in bird beak size traits within this population. hibernation mutation asexual reproduction migration sexual reproduction

Explanation:

• Mutation: Introduces new genetic variations. These can lead to different beak - size traits within the population. For example, a random change in a gene could result in a bird having a larger or smaller beak than its parents.
• Sexual reproduction: Involves the combination of genetic material from two parents. This recombination of genes during meiosis (formation of gametes) and fertilization can create new genetic combinations. Different combinations can lead to a variety of beak - size phenotypes in the offspring.

Answer:

Mutation, Sexual reproduction