I would say B so yea...hope ur day doing well
This is extremely vague, but assuming this is regarding concentration gradient in the nervous system, the Sodium-Potassium pump is responsible for transporting sodium and potassium.
The offspring would be 50% BB and 50% Bb, so the plants would be tall. :)
The lower the fossil the older it is.
So, if two fossils were in different layers of sedimentary rock, the lowest fossil is older.