Answer:
Changes in the environment affect the food sources available for birds. For example, if a flood was to occur, there would be an abundance of fish to birds to eat. So birds with bigger beaks will be able to eat fish, to live and reproduce offspring with bigger beaks. While birds with smaller beaks will not be able to catch fish to eat, therefore decreasing the population of birds with smaller beaks.
Answer: Cations (positively charged ions) are surrounded by the negative dipole of the water molecule and the anions (negatively charged ions) are surrounded by the positive dipole of the water molecule. A lattice structure is formed when water molecules surrounds individual ions.
Yeah, they are right!! Child with group A must be adopted
As john's genotype would be Ib Ib, which must pass his one Ib, and in the presence of that, offspring can't be of type A