It prepares to fight danger or run from it. It identifies the primary source of danger.
Answer:
C
Explanation:
she is collecting data by counting the number of eggs that were laid
The nitrogenous base found in DNA but not RNA is called thymine. That's what it bonds to.
Answer:
Either (1.) Fossils or (2) Radiometric dating.
Explanation:
Fossils are an obvious answer to this, but radiometric dating is the method most scientists use to find the age of rocks. Radioactive isotopes break down predictably, so the farther along this process is, the older the rock is.