Estimating the age of a rock layer
o mun
use what you know about relative dating to choose the
correct answers from the drop-down menus.
ethan determines that layer b is 3.5 million years old.
due to the
he can
estimate that layer a is
years old

Relative dating is the technique to calculate the age of an ancient materials in comparison to another material's age. Layer A is less older, if layer B lies beneath it. Layer A may be 2.5 to 3 million years old.

Explanation:

Before discovery of radioactive carbon dating method, geologists make use of relative dating method in order to determine the age of rock or fossils. The relative dating procedure often referred to as stratigraphy. Though this procedure is not capable of predict absolute age or dating. In relative dating, is mainly based on the fact that the older rock layers will be deeper in respect to the less older rock layer.

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.