The answer is D. Always true in all places
.-. from what I can see, no :/. but then again I cant see the model for the dog if there isnt. But based of this, the Skeleton structure isnt within a same group class, but the Dolphin and Dog do share a similar inside, such as similar Lungs, Immune system, both require air to breath (despite the dolphins ability to live in water)
Theories explain phenomena, whilst laws are generalizations which characterize them.
Very true. There are several phyla
No question, but team x has 200 more newtons than team y and therefore will win.