What is the first step of seafloor spreading? a crack forms in oceanic crust. molten rock rises up through oceanic crust. molten rock solidifies at the center of the ridge. new material pushes older rock away from the ridge.

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.

Will camels hump ahrinks.give reason

24. how are vaccines used to keep people healthy?