in estimating the age of fossil specimens, an important concept is that— a in undisturbed layers of earths…

in estimating the age of fossil specimens, an important concept is that— a in undisturbed layers of earths crust, the deeper a layer is the older it is. b the structures of animal fossils found in different countries cannot be compared. c fossilized animals must have skin attached to the bones for age determination. d in undisturbed layers of earths crust, the deeper a layer is the younger it is.

in estimating the age of fossil specimens, an important concept is that— a in undisturbed layers of earths crust, the deeper a layer is the older it is. b the structures of animal fossils found in different countries cannot be compared. c fossilized animals must have skin attached to the bones for age determination. d in undisturbed layers of earths crust, the deeper a layer is the younger it is.

Answer

Brief Explanations:

In geology, in undisturbed layers of Earth's crust, new layers form on top of older ones. So the deeper the layer, the older it is. Option B is incorrect as animal - fossil structures in different countries can be compared. Option C is wrong because skin is not necessary for age - determination of fossils. Option D has the wrong relationship between layer depth and age.

Answer:

A. in undisturbed layers of Earth’s crust, the deeper a layer is the older it is.