Heels are Posterior to the toes.
Biceps are Anterior to the triceps.
Hamstring is Posterior to quad.
Answer:
A good index fossil is one with four characteristics: it is distinctive, widespread, abundant and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms, but certain land organisms are useful in young rocks and in specific regions.
Explanation:
Well, according to the theory of evolution, the reason that organisms of two different species would share a common ancestor is that way back before evolution really took place, there were species that were all grouped together. After time, these species needed to evolve in order to adapt to the way the environments were changing. For example, dogs and wolves are not the same species, but are related and share a common ancestor, causing them to look alike.
