Which contributes to the polarity of a water molecule?

Ineed to know why d is the correct answer asap

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

The function of the excretory system is to control homeostasis and