Jill is blood Type O. She has two older brothers (who tease her like crazy) with blood types A & B. What are the genotypes of her parents with respect to this trait?

There you have it.  Jill's parents are IAi & IB

Explanation:

one brother: Type B, one of the parents must have the IB allele

other brother: Type A,

other  parent must have the IA allele & have a genotype of IAi.

Jill's parents are IAi & IB

a warm, wet climate will produce the highest rate of weathering. the warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering (figure below). this happens because plants and bacteria grow and multiply faster in warmer temperatures.

the answer is d. chordata