The cell mass that develops from the fertilized egg implants itself in the uterine wall during the stage of prenatal development. a. fertilization b. fetal c. embryonic d. germinal

answer; the correct answer is conflict- related aggression; +

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.