Because the rock is laid down over time, the oldest rock (and fossils or whatever) will be in the lowest layer. As you go up, the age decreases - you are looking at younger rocks.
This doesn't tell you the *absolute* age of the rocks - you can't say from this evidence whether they are 100 million or 500 million years old. But you can see changes over history and you can get an ordering in time.
Answer:
Antidepressants
Explanation:
Antidepressants are drugs developed to treat people suffering depressive and other mood disorders by relieving the symptoms. It is also useful in managing some addictions. These drugs perform their function in the brain by ensuring to balance some chemicals in the brain, referred to as neurotransmitters.
Examples of antidepressants include Prozac, Paxil (paroxetine), Wellbutrin, Paxil (paroxetine) etc.
The mRNA is “read” according to the genetic code. This is a step in translation, the mRNA relates to the DNA sequence to the amino acid sequence in proteins