How does the variety of birds beaks support the theory of natural selection?

Certain bird species have different kinds of beaks for what they adapted to eat. For example, if a bird who lives around an area with lots of seeds, it will rely on that food source and so will the others with it. Every generation after the next will slowly evolve a better beak suited for cracking and eating nuts, therefore giving the bird a better chance of survival.

After every generation, they adapt more and more to survive on a certain food source.

weathering is the answer.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.