The answer to the question is c) a dendrochronologist interprets tree rings
Answer:
This is very vague. I am pretty sure that there are other instructions.
The ability of an organism to survive and reproduce in its environment is called adaptation. Fitness is a result of adaptation.
Answer:
Saliva contains amylase, a starch digesting enzyme (chemical compound that catalyses the breakdown of starch); the starch gradually converts to sugar. Once the starch is broken down, the blue color disappears.
Hope that will help mwah!