The two processes that are most likely to cause the variation in bird beak size traits are ; ( C and E )
- sexual reproduction ( C )
- Mutation ( E )
The Random Mutation occurring in birds due to the environmental factors and food availability in an area will to lead to the varying changes seen in the size of beaks of the bird within a population. long beaks are used to pick out food from cactus plants while short strong beaks are used to pick out food underground.
Sexual reproduction between birds with varying genes will lead to the formation of varying beak sizes traits seen within a given bird population.
Hence we can conclude that the two processes that are most likely to cause variation in bird beak size are ; sexual reproduction and mutation.
Learn more : https://brainly.com/question/19770503
