The answer is; UV (ultraviolet)
The security pens use UV light to illuminate some marking on an object,such as a watermark, to identify its authenticity or owner. The markings are usually invisible to the naked eye under visible light. The marks are only visible when illuminated with UV light. This is because the marking is made of a fluorescent material that absorbs light of a shorter wavelength (this case UV) and emits a longer wavelength (this case visible light).
Answer:
The correct answer would be option D.
I statement would not be a valid response as it is the fact on which the conclusion was made.
On the conclusion provided, one should ask about the cell type used in the study and the amount of chemicals those cells were exposed to.
Different types of cells may response in different manner against a particular chemical. For example, stem cell would response in different manner whereas differentiated cell would response in different manner.
Similarly, the amount or concentration of chemical plays important role in any reaction or cellular response. For example, the affinity of haemoglobin is high towards oxygen in alveoli whereas it is high towards carbon dioxide in body cell.
So, the correct answer would be option D.
Let's think about this question and ask our selves what is life?
Think about a non-living thing, like a bike.
Does this bike have kids? Does it need to eat or sleep? What is it made up of? What does it need to survive? Does it need to be able to sense the environment around itself?
You're probably saying, no the bike doesn't do a lot of these things.
Humans, animals, and pretty much all living things need to perpetuate their genes by means of reproduction, whether it is asexual or sexual.
We need to animals need to eat and sleep, but you can just categorize this as a metabolic process. Plants need Nitrogen and CO2 and sunlight, to undergo metabolic processes and make glucose (another metabolic process). We also must be able to maintain an equilibrium while conducting metabolism (homeostasis).
We need to be able to sense the environment around ourselves to survive.
If you look at simple organisms, they are often able to detect different chemicals and know to be attracted or stay away from certain substances.
All living things are made up of cells.
Total Body Fat
this is to compensate for lower caloric output.
